Don't be stupid, the keys are made piecewise so that YOU are the only person with they key. I have been using a key from them and I have no problem with it, talk to ThePiachu, he runs the site. If somebody stole money from you it's entirely your fault.
ALL ADRESSES ON THAT LIST ARE VANATY ADDRESSES MADE ON THAT SITE !
My other addyes are untouched on same wallet, i have backup and private keys for all of them in same place , if somebody hacked ME , he would get all my balance , not ONLY form that vanaty addy .
Sad thing is i had 90% of money on that address .