You can thank Tynt for that - and it's not just used by TechCrunch. The easiest way to opt out is to block tcr.tynt.com in your hosts/adblock/privoxy settings.

Offending file: http://tcr.tynt.com/javascripts/Tracer.js

Especially if you are trying to address specific points from the article on your comments on their site (or anywhere else).

One wonders what percentage of the time that gets manually edited out right after pasting. 95%+?