This has been debated here before. I should without a doubt be treated like it does in college. 15 yards if beyond 15 and spot foul if under 15 yard. The 30, 40, 50 yard BS is not fair especially when you consider how inconsistently it is called.
Most assuredly we will get people in here who will make asinine arguments that if a 15 yard penalty then dbs will be committing PI on purpose when they are beat.
But that is such a stupid argument because if they are beat that bad they aren't in a position to commit PI. This isn't an issue in the college game.