yes, it is a penalty that occurs on a point after touchdown attempt when a player uses another player( teammate) in an attempt to propel himself higher to block the kick.
If the penalty is accepted, it is no catch. If the penalty is declined, yes, the pass attempt counts.
Yes faceguarding is a penalty in college football
There is no penalty for that
There is no evidence that such a penalty exists in any football league currently.
Spearing is a fifteen yard penalty.
It is considered a personal foul and is a 15 yard penalty. -Football official
This penalty is called "Clipping".
If you tackle in flag football it is a penalty.
class 4 felony