@Furries unfortunately yes.
Sometimes it's just a "kick" to prove how clever they are in outing the OP, but other times it can be more sinister.
As with any online forum the key is not to divulge anything you would not want to be made public
I think people get secure in the anonymity of MN and forget the accumulation of information they have shared, from where they live (responding to a "is this school good" thread), their politics (on Brexit threads) and lifestyle (advocating premium expensive make up/clothes on style and beauty) etc etc...
All it takes is an advanced search to see all posts and accumulate the information.
It's why it's either good to be very circumspect about what personal info you post or name change regularly.