The strange thing about the OP's word (unsubscibe) is that by clicking on the "unsubscibe" button you're actually demonstrating to the originator that you've bothered to read his crappy email and he's therefore more likely to send you more 'electronic effluence'.
So in a strange juxtaposition (now there's a word you can get your teeth into
) by clicking "unsubscibe" you're actually subscribing 
So in a strange juxtaposition (now there's a word you can get your teeth into

