I'm on the verge of permanently blacklisting sites which play those annoying self-starting videos as soon as you load the page. It's a crappy design practice that's spreading like the plague.
The worse ones are the ones that load a player and start a video after 15 seconds or so. You'll be half-way down the page wondering where the noise is coming from.
I use firefox, noscript, and flash is turned off. A lot of sites are annoying to read with a lot of animation and annoying text pop up bar that 'remove object' extension have a hard time removing.