While I do agree that most of the time it won't be an issue, I will take exception to the whole '1% use the internet and tell folks' comment. I've been going to WDW at least once a year, and more often twice a year, since '99. On my first visit there, when dd was 5, we had the only great parade experience we ever had. We were at the beginning of the MSEP....standing a row back from the curb, right outside the 'fire station' area. A nice older couple asked me if my dd would like to sit on the curb with them. She had the best time...well, until the ladybugs came at her from the parade!! My mother and I just stood there and watched her have a great time.
Other than that?? Mostly not so great experiences. I've had people shove past us. I've had people grab something from my dd's hand, just as a CM in the parade handed it to her, and then run away, laughing. I've stood in place for 40 mins, only to have a family come up about 20 mins prior to the parade and then complain to a CM that they can't see over my head!! They had a stroller and kept shoving it against my leg. I chose the spot I chose because it was at a corner so I really wouldn't badly impact anyone. But a CM finally asked my dd and to sit down to allow the woman behind me to see, as well as her child in the stroller...the child that never woke up!!! Meanwhile, my dd (5'10'') and I (5'8'') had to sit, hunched in a 3' square area. My knees hurt so badly that we had to leave the park after the parade...which is why I don't sit down to begin with. Or the lady that decided she and her child had more of a right to our spot because her child was younger than mine.
Or the parent who moaned and groaned that her child (about 7) wasn't going to be able to see...and the parades are for kids anyway, so why were there adults up front to begin with?? All this 10 mins before the parade started. A nice family, up front offered to have her child stand with them....she accepted then started pushing forward, saying that she couldn't see her child anymore and she needed to be with him, so move over for her.
Those are just a few examples...I have many more. So, no, I no longer go to parades. There are just too many entitled people out there. Those that don't see the need to get to a spot early...after all, they can always bully someone into letting them in.
So, sure. Most people are nice and well mannered. But, it only takes a few bad apples to ruin it for everyone.