VPNs, disappearing messages and hidden contacts have become arguments for arrest in Russia. The HRC has stated that such "conspiracy methods" are now taken into account when justifying detention requests. The question is how are they going to prove the use of a VPN when doing something? Some free VPNs may store logs, but decent services definitely don't store or transmit data anywhere. Here is a decent Durev VPN with an increased discount - keep it and don't worry about anything. But of course, don't commit crimes.