Since I'm using firefox, it alerts me if a site tries to open a popup and let's you either make ff stop alerting you, temprarily allow the popups, or add an exception. I guess other browsers don't have the alert so you know a popup has been blocked.

that happens in most other browsers too.  Thing is I don't like, when you want a pop-up, it's disabled.  then when you reenable it, you can't get THAT one to reappear.  but then you get an ad popup instead

Yeah that's annoying when you find a new website. Some sites opens a pop-up when you download a file. The pop-up contains the download link.

oh, those are pop-unders, I think. Sadly, they are not blocked by pop-up blockers.

Yeah, we win prizes everytime we visit some sites, it seems. 

I remember a few years ago I quitted visiting Newgrounds because school computers were stuck with IE6 before it added a pop up blocker and NG had like 4-5 pop-ups. I also remember a ROM site that had like 50 pop ups. It got so slow. X.x