It's football. There's always risk of injury. Standing on the sideline even presents a risk, as shown by Charlie Weis. Standing on the sideline should not cause points to be taken off the board.Just because it's not a case of a player injuring another player, doesn't make the chance of injury any less real. If they continue to allow players to somersault into the endzone without any real consequences - and let's face it, in the mind of a 19-22 year old, 15 yards on the ensuing kick off is hardly a "consequence" - someone is going to get hurt, and probably very badly. All it takes is a mistimed, under-rotated leap to create a quadriplegic.
Even still, penalize it. Fine. Just don't take points off the board for something that does not (A) give the offending team any advantage at all, and (B) is of absolutely no injury risk to other players. If you will penalize players for exposing themselves and themselves only to added injury risk, then you should penalize punt returners for fielding punts without adequate space. You should penalize QBs for stepping into a throw and taking a hit by an oncoming DE as opposed to cradling the ball and falling into a fetal position.
Penalizing it is fine with me. I'm not a huge fan of it, but I understand it. Penalize it.
Don't take points off the board and field it at the 2 yard line.