I see this often. Iam 2 houses away from the where the bus picks up. When my youngest now in middle school first started K I was shocked to see that I was the ONLY parent to walk to the stop everyday. I found myself yelling and discipling kids that were acting up, playing in the road, etc. After the 3rd grade I made it clear by writing a letter in our local paper that I was no longer the bus stop baby sitter. For the next couple yrs I would stand in our driveway and when we saw the bus my son would walk the 2 houses and get on. This way we totally avoided the stop and my responsibilities for the other kids' actions. My schedule has now changed and I can take my son every morning to middle school but to this day when I look down at the stop there are only children. NO parents. Parents think they are safe at the stop, don't need supervision and they couldn't be more wrong. I used to yell at the kids b/c they would ring people's doorbells and then run back to the stop. One man came out and yelled at me. I said hey look, he's not mine! I filed many complaints with the bus garage and school. The letter in the paper did help. I think I made parents feel dumb. Elementary and even middle school kids need supervision! I feel for you. I would say something to the kids every morning and file complaints everyday with the bus garage, school and police station. Something will get done b/c they'll get sick of dealing with it.
Good luck