How to protect yourself when elo boosting?

So how do you protect yourself from not getting banned when elo boosting? Where can get a good VPN? I have been using WTFast before but i'm not sure if it actually hides your IP address or not. What would be a better solution?

Also i wanted to know, if Riot scans your private chat logs with friend list? And do they scan champ select chat?

you over thinking this ;)