And you don't even need an IP. People just really tend to volunteer enough personal information about themselves in online conversations. Not all at once, not on purpose, but a little snippet here and a little snippet there, and someone who's stalker-dedicated to read through all your stuff and find out what other places you post at, can really whittle down your location just from your isolated off-hand remarks and maybe some photos you've shared even if you removed the location data from them.
There was this one weirdo I knew in high school that made like a straight up dossier of people he interacted with, with notes of any personal information he found about them. I don't know whether he was a stalker of any person per se, but he definitely put himself into a position that he easily could've become one with the information he gathered. I fell out with him after I got a phone call from a girl I'd never heard of who said we'd been talking online for a month, and it turned out it was because this guy had made up an email account for me pretending to be me (the email was literally [myRLname]@yahoo.com) while talking to this girl, and eventually he gave her my real phone number, however the hell he got that, all to try to "hook me up" with this girl he knew. Literally the only time I ran into him after high school was when we both happened to be training at an incoming call center for a mobile phone company, and he was fired during the training period because as soon as we started training with live data he was caught just looking up names of people he knew to see if they had accounts he could get personal data from.