I won't name specific threads but I've seen this happen a few times and it really winds me up.
OP says something that contains an error of judgement, or a nasty tone, or something that gets a deservedly negative response. (To my mind, and evidenced by the fact that 99% of replies are of the same opinion.)
OP then comes back to the thread stating that they have numerous issues like anxiety, depression, health and personal problems. These issues, real as they may be, seem to have no relation to the OPs first post. For instance they say "a woman at baby group is a terrible parent for FFing her baby". All other posters rightly say, "none of your business, don't be so judgemental". OP then comes back to say "oh but I'm going through a really hard time and I have terrible IBS". Which is awful for them, but nothing to do with anything.
A heap of new posters then come in telling off the first posters for being "mean" and "giving the OP a hard time".
Am I being unreasonable in thinking that
A) if you post online you have to be aware that you don't know who's replying and you're leaving yourself open to differing opinions, which you may not like. If you're too emotionally fragile to handle it then maybe you should either get some RL support or mention this in your very first post so people can consider their responses appropriately. I don't mean anyone with these problems should have to walk around with a big neon sign saying "I suffer from such-and-such", only that if you're going to have to mention it later on because you find the responses too difficult to hear then maybe you should save yourself the upset and allow people to be more gentle with you from the start.
And B) you shouldn't use your personal issues as a get-out if your OP attracts negativity. My brother is dyslexic and used to use this all the time. He'd be incredibly rude and then say "I can't help it, I'm dyslexic." Actually, that has nothing to do with being rude. You were rude, own it and apologise for it.
As a disclaimer: I have very little experience of living with depression, anxiety or lasting health problems (aside from a decade with anorexia, which I'll mention now in the spirit of the thread) so I may be being ignorant and unnecessarily harsh. Happy to take that on board and be told IAMB.