“In one tweet Mr Miller wrote: "I was assigned mammal at birth, but my orientation is fish. Don't mis-species me." This tweet was among several others which were reported to Humberside Police as being allegedly transphobic.” https://www.bbc.co.uk/news/uk-england-lincolnshire-51501202
Any minority group who bring such cases because they have been "offended" by a comment or a joke about their precious "alternate" lifestyle, should take a few steps back and admit what they are really demanding - a total ban on everyone's freedom of speech, except their's! You're stirring up a hornet's nest for yourselves by demanding laws & rights which the majority of society do not have.
You've already gained a helluva lot. Everyone else is subject to humour, sarcasm, etc. Why should you be any different?