Originally Posted by
FatBastard
Not exactly true there willie, with the shortage if IP space these days most ISPs use a technology that can have many people effectively sharing an IP. And free wifi is good so long as, of course, the device you're using was bought for cash and NEVER used on your home network.
And while an ISP would log you're network activity it's not like Joe Public has access to that information, so unless you're up to something illegal enough to warrant a warrant you've nothing to worry about - and if you are then slap it up you.
The only possible leak of info would be if your ISP assigns you your own (possibly static) IP address that could contain your ISP username in the host address, but that's easy enough to check from plenty of free ip lookup sites.
TL;DR Say nothing in private that you don't want public, don't do illegal shit.