Mooooooooooooooooooooooooo you have the tact of a world class hostage negotiator. Hell if ever I'm abducted, the moment it stops being fun, I hope yer there to secure my release, uhmmm change that to freedom.
Looking for the car, I got one of those "lock-up" shopping carts. I literally shoved it across the parking lot. It did make noise, and leave a trail on the asphalt, but no one had any comments about the process... :-) I was sore, later, but I got My way!
But pools are not made to kill people, it's a place where kids are supposed to have fun. Finally I think the best way to prevent accidents is definitely keeping them away from any weapon, the same way you would simply forbid them from touching matches.