I rarely watch parades, but during one of the rare times I did it was at DHS, it was myself, DD11, my niece, her hubby and their son. Great Nephew was in his stroller and we had our spots, everyone there, used bathrooms before finding a spot. A woman comes up and pushes her 2 duaghters (ages about 8-10) to stand in front of the stroller. My Great Nephew was 4 at the time. They went back to their mom for a moment and we filled in the area so they couldn't block his view. I am not a confrontational person but when the mom complained my niece said well they were blocking my son's view and we were here first. I was on the left side of the stroller and the parade was coming from the right side. I told the little girls to stand in front of me and not to block the little boy's view. Being a single mom I know how hard it can be taking the kids to Disney alone but your joy shouldn't be at the expense of others.
This is one of the reason I avoid the parades. Only one I like is Boo to You during
MNSSHP, I always wait for the 2nd parade and watch from Frontierland.