Totally invisible, and it's anxiety-inducing. here's my mom's story:
We went a few years ago for my daughter's first trip and, like many who need ECV's, my mom can walk for stints, but a 10+ mile avg over a day is
well out of the question. So we rented an ECV for her. She was nervous learning to drive it but became a pro on the first day! People would
constantly be walking in front of her, and she told us it was incredibly stressful because she felt like she always had to be on "high-alert". It was more stressful than driving because it's not normal for people to just walk out in front of your car, but people walked in front of her ECV every few minutes. My mom has pretty severe anxiety, so we really needed to figure out how to accommodate her. She was having mini panic attacks!
We actually decided to walk in triangle/diamond formation, lol. Sister in front pushing my daughter's stroller, mom behind her a few feet, and me on the left in between them (and my daughter on the right whenever she was walking) so nobody would "cut through" between them and in front of mom. We'd then try to hug the wall/sidewalk on the right, esp when daughter was in the stroller. My daughter loved it, she said she felt like she was on "Meme security detail"

. It worked so well! Until...
Mickey's Christmas Party. There was literally NO room to actually do this down Main St. We tried it and it didn't really work, and movement was so slow people were just coming from both sides cutting her off from the street and from stores, and she said it was so packed she had no idea who might pop out in front of her next (at least when it's open you can see someone coming). Driving was a constant start and stop, and we could see her frustration growing every minute.
The last straw for my mother was when we had gotten into a more open but still busy area and some mom rushing to somewhere cut between our formation so close she shoulder-checked my sister and literally dragged her 3 year old right in front of my mom's ECV, and of course my mom hit this poor little kid (he was weirdly unfazed btw, lol). She then had the nerve to start SCREAMING at my mom at the top of her lungs "watch where you're going you old B, what the F!". Straight screaming swears in front of tons of kids. My mom was SO EMBARRASSED, and she started tearing up and having a huge panic attack. My sister was about to jump in (she has a mouth and isn't afraid to use it

), but a completely unrelated family all came to my mom's defense and started yelling at the woman all at the same time, so we just stepped back and took care of mom, and my daughter, who has now started crying seeing my mom upset and was trying to literally run away from the crowd (daughter is autistic and hyper-empathetic). It was a mess. I was able to walk my daughter just a few feet away and sit down. Many people came up to them and asked if they were ok, offering them water bottles, snacks, etc, even a 2 year old tried to give my daughter her Rapunzel baby doll

(that one made me cry, I couldn't handle it anymore). They were all
very kind. But mom wasn't ok unfortunately, and she decided she just couldn't do it anymore, she was done for the night. It all happened so fast, we were only there for a short time (we had to go late, daughter needed a mid-day rest), and I don't have to tell you what those tickets cost. I felt
so bad for her. A CM showed up out of nowhere with a wheelchair and walked her to the buses. She told us
in no uncertain terms that we were not to leave unless my daughter wanted to, she'll be fine, we NEED to stay (again, expensive tickets, and you better listen to momma

). Sister asked another CM who had shown up to help us get the scooter to the front and store it until we left. He had security with him and the woman was escorted off to who knows where (again -- that poor little kid!). A totally different CM showed up with a balloon for my daughter. So many CM's, lol. I was honestly surprised, I figured they'd all be busy and overwhelmed. Excellent treatment from CM's and other guests.
It was tough getting her out of the room the next day, but we had to remind her how well our formation works when it's not insane crowds. We had a few more incidents, but nothing as big. We've decided we can't really do any parties anymore, and can't go during busy times either. It's tough because mom is like many here: lifelong Disney fan/kid at heart, and just thinking of returning now makes her incredibly anxious.
As for my daughter, she already wasn't handling the walk down Main St too well but she was determined and getting thru it with her coping mechanisms (she insisted we go, she wanted to go on Thunder Mountain for the umpteenth time). After this, she can't handle medium/heavy crowds
at all.
I'm disabled and am now also in need of an ECV to get through a park day. I'm dreading it, TBH, and not sure what we're gonna do when mom comes down as well and we've got two of us. Maybe we'll be more noticeable as a "scooter gang"?