My lil bro and I contently have people over. Usually there are no parents, considering they are divorced and my mom is usually working. It does get annoying occasionally , but just lay down some limits and it's always fun, and when people try to push it to the limits, put them in their place. I usually end up beating someone once a day, but most the time it's my own little bro. It sounds like the kids are completely taking advantage of you guys, so warn them than like 30 seconds later tell them your going to boot their ass, whip them, suffocate them, choke slam their ass, kick them in the ass, drag them around the house by the legs including stairs, throw shit at them (such as full water bottles, scissors, bike wheels, sticks, ski poles, snowballs, phones, things that look like dog shit, screwdrivers, books, spoons, forks, ping pong paddles, pretty much anything near you), make them eat pine needles, make them eat grass, make them mow your lawn, force them to vacuum out your car, or any relatively comical hurtful act. It's worked for me for about 10 years now, as long as you can still take them.