I really shook my head at the 'slut' comment, which was insane even coming from an embittered Martha fan

Likewise -- I mean, the Slut!Ginny 'analysis' was ridiculous enough, but Joan isn't even dating anyone ... (Not to mention that Martha got the guy in the end, as least sort of. I quite like the development of her 'crush' storyline, although with the Doctor doing his 'do you trust me?' bit every week you have to feel that it's being set up for a crash where it all goes horribly wrong at some point.)