I used to work for an ad-supported company, so I’ve always felt kind of bad using AdBlock. I bifurcated for a while between keeping AdBlock off except for obnoxious sites, or keeping AdBlock and whitelisting sites I frequent that aren’t obnoxious. It ended up getting to be too much of a hassle, so I’ve browsed with AdBlock on full-time, and a handful of sites whitelisted. I still feel bad doing so, but not bad enough to unblock.
Recently I’ve noticed a couple sites that are really slow. Firebug shows they’re doing tons of crap. Uncrate seems to have something that will go off and do an AJAX post any time I scroll to expose new content, and content from several other sites is pulled in. Slowly. The site locks up my browser for a moment. Some other site I went to the other day managed to peg one of my cores at 100% CPU usage. I don’t even know what it was doing.
The other great thing about NoScript is that it blocks Flash by default. I like Flash for things like videos. But Flash is also insidious in its use of persistent cookies that your browser doesn’t control. Using Adobe’s site to view saved Flash cookies, I have a ton, mostly from sites I’ve never even heard of. I deleted content from all of them, but also don’t permit Flash to run by default.
The Internet looks pretty crappy now, but right now I prefer that to sites that are crappy.