Back in the day you'd get bombarded with popups and stuff but then browser security and such improved and that practice died out.
Now, I feel like sites are doing this again except that it's a popup within the same page so it's not technically a "popup". GDPR "Accept all cookies" is annoying enough but there are more and more pages that block out the page and ask you to sign in in order to view the site. I hate these. Thankfully, a bunch of them can be worked around simply by inspecting the "pop-in" and deleting it in the developer tool. Still really annoying though.
Just throwing out another example of websites getting in the way with JS.
"Forces act when not restrained" - Puckdropper