that have so many third party script calls that my security stops that the page is almost blank and virtually unreadable without all the content sucked in from elsewhere. I've even seen a few sites that won't display the main page code until AFTER it's pumped all the ads onto the site, so blocking them stops the site from loading at all.

The results from the above is that I don't do business there and they go on my bad site list that I tell people not to bother with.