1 point safety

[johnnybgood]

I am not an official, just an average fan.

I understand that in NCAA , the defense be awarded 1 point on a safety by offense.

Can the the defense be awarded 1 point on a safety by offense in nfl or high school. This would not involve change of possession if offense ran backward out of its own end zone 98 yards. What would you announce to the crowd? I understand it says defense cannot score, but is the spirit of this that defense cannot gain possession and attempt its own try (since it was not the one scoring the touchdown). If there is a safety by offense (offense commits huge blunder), and the play meets all of the other standards, is defense awarded one point?

Also, in high school and college, can a placekick or dropkick that is not behind line of scrimmage score a field goal? This was legal in nfl until 1991.

I am pretty sure that the nfl rulebook spells out who receives a kickoff after touchdown, safety, and field goal, without leaving any choice in the matter. What exactly does the high school and college rulebook say in this regard (and if I am wrong about the nfl, where do I find this in the rules, because the section on scoring clearly states who will receive the kick)?