Perhaps it's not worth mentioning this, but I ought to give my 2-cent for it any way.
... I mentioned my first crush (INFP) a little earlier. Well, after so long I found myself surfing that crappy site, hi5, which we joined when it first became introduced in the beginning of 2005. Now back then, I was modest about it - set up a simple moderately detailed page. However I found when she developed her page, it was absolutely 'next' level. Full of... life that literally gets to your head, I can't get any more serious than that! Turns out I checked up her page a while ago and... even worse, she'd cramped it with even more 'life' of her own version, and the effect is the same - reminiscent, unbearable and quite simply, out-of-reality. Her text is even written in a way that 'will' pain the reader. This is quite bad, because at the time I thought I knew her, but turns out these were her true colors, her true life perspectives.
... Coming back to this topic, she (INFP) used to tell me how depressed and lonely she feels, and that she tries to relate to memories where she was perhaps brave at some points in her life and that she lacks confidence. Never really explaining why either, and never really seemed to appreciate the advise she was getting.
Therefore, as far as I could relate with my experience with this one strong-sensed NF, pity comes around as a result of the NF's own doings or misdoings. There is no way a normal minded person can become pitiful unless the majority says so, or addresses so. Now, given her 'life' was visible on a 'public' page that is Hi5, where virtually anyone can view, and thereby conclude, it's not uneasy to conclude that in some ways... she was asking/gagging to be concluded in a manner that would make people address her as such. Call it naiveté or plain stupidity, the 'responsibility' for it ends up somewhere or someplace.
... And that's the beauty of life - we practically don't run away from our misdoings. They're part of us in what develops in us... called responsibility. Nobody can get away with anything, except that (say) somehow human nature develops a 'restraining order' for it.
People ought to stop unconditionally sympathizing for random people with issues, and start by understanding where the self-pitying person went wrong and impose tough measures on them - to beat them out of their shells. All the self-pitying person is really doing is being cautious that his/her plights don't get any worse... should he/she be forced to behave like they (otherwise) normally do. Real bad for their future outlook, eh? I gave the INFP as an example because for one, I wanted to forget her any way, and another that she 'just' is a strong example of people out there going wrong. Not anyone else's fault... it's theirs - just wrapped up in a sugar coat of some kind of deception.
... Besides, I was never a fan of Hi5 any way, and wanted to vent my thoughts out, here.