Yes, it is clearly a big misunderstanding, I still have nothing against Microsoft as a company, this petition is against the Anti-Spyware division. Don't forget that this is probably the same people that were working as Giant before, they've been bought but Microsoft is a big company, each one with its own set of employees.
And to answer the question, yes, you can quote this page anywhere you want (as long as it is with good intentions of course
). Thank you all for the early support, I can't wait to send the first box of letters to Microsoft. The count of current signatures will be added tomorrow, when there will be more than a hundred or two