I just got these 10 e-mails 5 hours ago from
Recently, you asked a question on [X] Stack Exchange, but you haven't verified your email address yet.
Click on the following link to verify your email and set a password so that you can log in.
[X] refers to all of the following:
I haven't posted on any of these except for TeX.SE, but that was not recently, and through my real account. =
I asked about this here, and was told that someone seems to be impersonating me by using my email. Is it possible for staff to stop this?
Also, I'm pretty surprised there is no measure to stop people from using emails to existing SE accounts (see for example, on wordpress.com, if you use an e-mail which has an existing account on wp.com, you are asked to log in.).
I just got 2 more emails an hour ago for SharePoint.SE, and for AmateurRadio.SE.