Very nice.
I recognise you can't auto unlike everything.
On click can you shift the page a set number of vertical pixels to the next like button. Then I can just click to unlike in rapid succession.
Good point! At first on my end it seemed like this was already kind of implemented since after every button click I scrolled my mouse wheel one tick down and the buttons aligned more or less (for a bit). This might be a good workaround!
Tweepi do this for mass unfollow, see the Flush tool interface here: http://tweepi.com/tools/flush#0