It's a valid concern, though once you know which brand of vpn they are using, there is plenty of 3rd party documentation on what the problem areas are, how to w

It's a valid concern, though once you know which brand of vpn they are using, there is plenty of 3rd party documentation on what the problem areas are, how to work around them, etc. If you're extra paranoid, you could just run the vpn client in a VM.