You seem to be enjoying all this vitriol sp, as far as I can tell you seem mainly to hate her for her attempt to control gay propaganda in schools. Hell hath no fury eh? As some have said above, I would not lower myself into the Facebook/Twitter gutter to dignify this whole suggestion. You wallow with your TH's and MTH's.
I guess that shows there are some Thatcherites with a sense of humour at least.
The alternative possibility (that they think it is a genuine tribute song) couldn't be right.
Could it?