A friend points out the fact that no on would ever use something like I Like Everything on their real personal account. I have to concede the point that, well, the plugin just turns the Like button clicks into a huge shared web-history, and no one really wants all that Like spam anyways.
In any case, as a proof of concept plugin for Chrome, I’m happy with what I learned about the Chrome extensions system and happy the thing worked. I’ve got another idea that I code up at some point, so the groundwork will transfer.