On 'creepy habits' such as all the recent ERP drama, it's simple: Keep reporting it whenever you see it, just as Yoshi-P has kindly asked us all to do, the ERPers can whine, but when they blatantly try to cheekily advertise their 18+ content in PF, they deserve to be reported for it and thrown into the Gaol for it.
As far as your point on 'enabling poor play and coddling players' goes: Nothing. Because you don't get to decide how others play the game no matter how much you want to, people often meme and semi-complain about the tired line 'you don't pay my sub', but the harsh reality is.. it's true, you cannot dictate how others play, at most you can kick them for being an obvious dead weight (if using DF) or just not accept them into the party in the first place (if using PF).
No, people are not going to get penalized by SE for playing poorly and they're not going to get penalized for not doing things the way others want them to do things. You can do nothing.
