nope, you can't change the rules. the rules are simple
1-Some people say that it is mean and that they wouldn't want to do that to anyone...what if you are doing it as a favour. It could be a cancer patient that is fighting a painfull loosing battle. Or a 90 year old stroke victim that is liveing in there son/daughter's basment, and causing a finantial burden to his kids. Or a wife beater...or a terrorist...
2-what if you didn't push the button, and as a result, knowone died...but the person that would have died is still alive, and ends up being responsible for multiple murders, including one of your close loved ones?
???
Who would push it? anyone?