Safeties are usually bigger and better tacklers than the cornerbacks. In the NFL, the defensive team cannot earn any points on a 2-point conversion. The ball is dead. Points For and Points Against. If a players hands the ball to someone in the stands, there is no fine.
Some guys say that they get the ball back if the kick was wide right or left.
I say that the missed kick, even though they attempted it on first down, represents a change in possesion along with no points scored. If the offensive team misses a kick then the defensive team would get possession. If the offensive team has a poor snap on 1st, 2nd or 3rd down, and does not attempt a kick, they can retry the kick. A player is encroaching on the neutral zone when any part of his body is in it and contact occurs prior to snap. The official must blow his whistle immediately.