P4 does not guarantee safety from guys who have alerts everywhere! It will not protect you from anyone!
It only verifies employment for guys and checks ID of guys and girls. And collects OK's, just like OH2.
Membership there means 50/50 you will get a "nice" guy. Just like here. You must verify more!!! There are many girls, who refused to give OK's and it is invisible to others. All you see are OK's and who has given them.

Everyone on P4 is encouraged to do as much of verification as you need to feel safe! P4 does not give guarantees. Everything is up to you. Always and Everywhere.

I do lot more than just accept request. And many guys freak out if you ask for additional info, just like "Verified" members here do.