VPNs protect you from all manners of evil. However, if you are using or simply thinking of using a free VPN, please read the article by Joel Lee in the MakeUseOf.com web site at: http://www.makeuseof.com/tag/free-vpn-cut. Lee points out the benefits of a VPN and then lists 5 Reasons to Never Use a Free VPN.
Perhaps the biggest issue is near the end of the article:
“At this point, you have to ask yourself: why are they offering this free of charge?
“If you can’t come up with a good answer, then you’re probably the one being exploited.”
Joel Lee then provides a link to another article that lists several privacy-protecting logless VPNs that take your privacy seriously.
Start at: http://www.makeuseof.com/tag/free-vpn-cut.