ChromeI have yet to have a popup on this site. What browser are you using?
It isn't the board/site it is your PC. I suggest running some anti-virus and anti-malware.
In the mean time I recommend not putting any person info on your PC.
I think this issue is more predominant on phones. I'm on Chrome, but on my laptop and I've never had any of these pop-ups that people complain about.I'm using a phone. It's definitely not a virus. Only happening on this site. My phone is constantly scanning for viruses.
I primarily use Chrome on 2 laptops, Safari on my phone, and a Samsung browser on a tablet. None have an ad-blocker installed. I haven't experienced the annoying pop-up ads in a long time.