Yeah, I agree with you and randysquirrel; I've brought up almost that exact argument multiple times, but people don't wanna hear it. Just because the pf description doesn't explicitly state "350 dps or kick" doesn't mean that they won't kick you for doing under 350. They just won't tell you in chat why they're kicking you :P
I don't feel like most of the harassment-based arguments hold up either. The effective difference between "Your dps is garbage scrub gtfo" and "Your dps is 97 scrub gtfo" is purely semantic. Some people will be rude regardless.
And it's also pretty suck for ps4 players. Sorry guys.