>>513368784
Three reasons I imagine:

a) It's not 100K a year, it's 50K with the bonus dispsered over several years
b) Most posters here probably aren't fit enough to meet the requirements
c) Most importantly, most of the posters here are probably deathly afraid of real confrontation and mixed with that you'll be hated by the general public doesn't inspire confidence to join

You're really better off just joining the police academy if you're fit enough. Or the military, at least there you get actual training and benefits.