[Adam]

The penalties in force are what we like to call "deterrents." Deterrents are, by nature, preventative. The intentional foul is a deterrent. The penalties are increased from standard personal fouls because the rules committee wants to deter players from doing things like reaching across the OOB line and fouling the thrower.

I can see how maybe the penalties for traveling, personal fouls, and backcourt violations might not be considered preventative deterrents. TFs and IFs, however, must be considered preventative deterrents.