Yes, I don't really like sites which uses a lot of scripts since they sometimes make my computer freeze, or crash if the script is slow or poorly made.
I think if you use ad block or script blocking add-ons on your browser like noscript, adblockplus, etc it can make visiting some websites frustrating since a lot of the scripted content like flash video, java, and Javascript is blocked, and you have to enable scripts for the website.
Yep. That is why I always keep js disabled in my browser when I'm not playing flash games in my arcade and it is why I alway use NoScript in Firefox when I'm not using Opera.