Flag won't help. What will help is a scooter about the height of a John Deere riding mower, making the same amount of noise, with a cow-catcher in front, and an Obi-Wan Kenobi force field around the rest. Not sure even this would work.
Boy, ain't that the truth!!!!!
I can't tell you how many times I've wished for a cow catcher!!! My family usually serves as my force field - we usually look like some kind of macabre military reenactment group, LOL! Especially if I'm in the wheelchair instead of the scooter and I'm having to use the cane as a defensive weapon to keep somebody from falling into my lap!
The only time I've ever had a flag work on a scooter was the time I found a Marvin the Martian bicycle flag at
Walmart that had a lime green figure of Marvin at eye level on top of the flag with red blinking eyes. It worked pretty well (especially after dusk) until the batteries ran out and I couldn't find another one. It worked REALLY well during one memorable evening at a Food and Wine Festival when many people had imbibed a little to much and the band was a tribute to some psychedelic one, LOL!
Other than that, the flags get stuck on things in shops, then come back and hit you (or others). They can also be, depending on height, a PITA when going through entrances or elevator doors, especially handicap bathrooms. And, as Sue mentioned, they are definitely a danger to other people who will NEVER look where they are going, then blame you for it, since you are below their eye level.... but your flag won't be.