No site is more "safe" than the next anymore. The only difference with P411 is that there are more girls, you pay for membership, see a list of activities offered, rate and you collect okays. All of that means absolutely nothing to girls that actually screen. There are still agencies and tons of pimped girls on P411 just like every other site. Hell, a lot of girls that no longer place ads/deactivated their accounts are pimping a bunch of girls in various apartments and townhomes.
But y'all know this already.
There is now a massive hole regarding security in this hobby. BUT, it was coming.