I have been seeing advertisements "drop-down" from the top or "creep-up" from the bottom. And sometimes there is a box in the middle of the screen with a X button to close it
Yeah, I find these types of ads intrusive and very annoying. Just do what the review sites do and run ads down the right side of the page where they’re seen but don’t infringe on reading content on the site and/or require the reader to have to close it out. Argh! I’m all for A’gon running ads to make some $$$ off this valuable discussion forum, but I really dislike the way they’ve chosen to implement them. I’m gonna try the ad-blocking software recommended by @nonoise — thanks for that! Haven’t had the pleasure of the pop-up McAfee phishing garbage yet, but for those who have are you using Apple or PC (sounds like OP is PC based)? I use Apple and wondering if that may be helping with this or if it doesn’t matter.