One of my favourite hypocrisies on Tumblr is centred around its embracing of the neckbeard meme.
Here’s a site that claims to champion the cause of not telling people what to wear, of not body shaming people and never tolerating someone being a bully.
And yet here we have these overweight guys with a (poor) taste for mismatched headwear who probably receive a tonne of bullying in real life already, given what their appearance is like, being absolutely torn to shreds on here and the brunt of constant jokes. Never mind the fact that the original jokes were centred around self-depreciating humour of 4chan users basically taking the piss out of themselves. Tumblr the loving and accepting anti-bullying website that will happily embrace your right to identify as an amoeba will literally take something like that and turn it into a malicious attack on these people.
It is an absolutely superb lack of self-awareness on the part of those who indulge in some of the sort of misguided self righteousness about telling other people how much they are against bullying and how to be a good person.