We had a 10ft tall inflatable waterslide with splashpool before the pool. No matter how many times we begged, yelled, bribed etc, the kids (mine and many that were not mine) would be horsing around after 15 minutes. We basically had to man somebody at the bottom of the slide so nobody snuck climbing up it when we werent looking for a second. It was fun but there were many minor injuries. We were just as happy to toss it at the curb when we were going to get a pool.
So one of the first things we asked our PB about was getting a slide. He stopped us and said he had just removed his own slide because he was sick of his grandkids always getting hurt, horsing around and banging heads. 'Funny you should say that mr PB...... i just took a razor to my inflatable slide because of the exact reasons......... how much for a diving board?'
When my girls were little, most of our friends and neighbors had boys. I do think that played into some of the problem. We have friends with pool slides and now that they are tween/teen, the girls at the pool party have no problems using the slides in a orderly safe manner. If its a coed party..... the boys are jumping off the top of the slide.