Internet users are particularly careful about hiding their identity through VPN services when using P2P services, but according to a study conducted by VPNRanks.com, five VPNs are dangerous to use. Out of the 17 VPN providers tested, the review website identified Astrill VPN, ExpressVPN, Hide.me VPN, PrivateVPN, and SetupVPN for leaking user IP addresses.

In August 2015 Direct Spark, an online marketing agency from Targu Mures, Romania orchestrated an online survey on 1000 users from 10 countries about the real level of privacy a VPN gives to them.