Probably opening a can of worms here but a lot of the horrendous bench form I see belongs to bodybuilders. The style of benching where there is no arch, no retraction of the scapulae and, worst of all in my opinion, elbows flared, leaves the lifter open to more injuries. I used to bench like this and I screwed up my rotator cuff. Since I have learnt to tuck my elbows, my shoulder has been fine.
As far as I am concerned, the so called PL style is safer. If you want to get more chest activation, do some Dumbell benching or flies afterwards or simply stop just short of lockout and keep the muscles under constant tension.