Sean "Diddy" Combs houses were raided by Feds (Update: Diddy charged)

When my son was growing up (like pre-high school years), I never dropped him off and left him at practices or games (karate then soccer). A parent or grandparent was always present. Once he got into playing high school basketball, he was old enough to advocate for himself and knew better and was still being picked up/dropped off by his parents or grandma until he could drive himself or had teammates that were driving to drop him off.

My sons played HS soccer in Montgomery County MD. The HS's had a rule for student athletes, they were not allowed to drive to and from a game.....I thought it was a really good rule, games could be so emotional the last thing you want is a po-ed 16-18 year old driving after a tough loss....plus often they are emotionally/physically drained after games.....
I think you would need to get to know your coach and children. My wife and I coached the girls basketball team one year and parents were ridiculous. Me or my wife trying to talk and the parents kept chiming in. Personally it was a huge distraction.

Yup, having coached and managed youth soccer parents can be great, they can also be the biggest problem with a team.....I completely understand the notion of not leaving your kids unsupervised with coaches but we always had the trust of our parents, and in travel sports often there were only a few that came to some of the games/tournaments as chaperones if you will. We always had the boys room together with the captains in charge of helping ensure no trouble.....mostly worked out really well....