I despise the trans community on Tumblr. Obviously not all of the individuals there are bad, but just...oh my god. Seeing all the posts about how you need severe dysphoria to be trans, or how you should only start HRT if you'll kill yourself/harm yourself if you don't, all of that actually made me start doubting whether or not I'm trans. I started feeling like I was a fake and I was fooling myself, because...I don't know, because I don't have terrible dysphoria or because I want to go on testosterone, but I wouldn't be suicidal if I didn't. But then I decided I'm not going to let people on the Internet tell me who I am. Lots of trans people have similar stories to myself, and they've seen therapists and given the go-ahead to start HRT. No-one ranting over the Internet is going to make me question my identity ever again. Those people are just poisonous, so destructive and do more harm than good, for the most part.
That said, Tumblr itself I like, mostly. Coming across a trans guy on Tumblr is actually the reason I decided to finally explore how I'd been feeling for a long time, and how I eventually realised I was trans.