Technically they are playing the game. It would be boring to me though. You can't kill them for it, unless they do something that you say not to.
They aren't breaking any rules.
Yeah I switched from Firefox, to Internet Explorer, even to Safari. It wasn't my internet because I loaded every other site perfectly. I cleared cookies, and cache, deleted history. Did some other things I can't remember.
If you told him he has a last request, he can kill you if he wins the game.
You shouldn't kill him, but I suppose it's not against the rules. (As long as he isn't rebelling)