Google vs. greasemonkey

Rajat Paharia railed against Google for disabling his gmail account after he installed the "greasemonkey Gmail delete button" script.

"I installed the GreaseMonkey Gmail Delete button and now Google has locked me out of my Gmail account for 'between one minute and 24 hours'. I'm surprised - use GreaseMonkey and Google whacks you. Oh mighty and benevolent Google, can I have my freakin' email back?"

I have been using the "Gmail secure" script with greasemonkey to automatically bump Gmail http connections up to https for weeks. When I logged in today, I was allowed into my account without complaint, but the script did not work - I was left in a state of email nakedness with http! What exactly is Google's motive here?