said by OHSrob:
You can't exactly put 175 people behind nat with a public address and expect things like pptp to still work. They probably have public addressing and can easily identify you.
Isn't this how some rural wisps work?
I recall there was gov talk and problems with wisps when it came to security and they want wisps to better handle how each person can be identified.
But this isn't applicable to this topic since it's different and not a scenario with the OP.