That's exactly why it needs to be something you are willing to explain. It makes their stories better.
It's very much not okay. In general, imposing labels on people is a bad thing. Doesn't matter how much better someone thinks they know, people get to explore their identities in their own way and at their own pace.
When I see someone imposing the egg or trans label I generally point them to the egg prime directive here.
When someone is just told they are trans, that opens ground for denial; it activates defense mechanisms built by internalized transphobia, and it has a high probability of pushing them further into the closet, if not making them outright transphobic. Even when it doesn’t, it leaves ground for their own subconscious to reject their dysphoria, claiming that they were just manipulated or deceived. The much more effective strategy is to talk about your own experiences with dysphoria so that they see the common grounds and come to their own conclusion about their gender. The code doesn’t forbid helping them to explore their gender; it forbids assigning a gender to them. Or, to put it more succinctly, you cannot be told what the Matrix is; you can only be shown.
As to why some people don't follow that. Either they don't know better, in which case educating them should fix it, or they are simply [epithet of your choice here]. Any community of sufficient size will have bad actors in it.
I have the urge to edit it to have a laser beam now.
It's a meme on the philosophy of what gender is. Being supportive of other people choices is nice but isn't really relevant to the meme.
A⇒B ⊬ ¬A⇒¬B
How are you tracking them to other sites? There's not really anything that links a user account to an actual person in the data that gets federated.
It's an uncountable noun. You are asking a question roughly akin to "How many airs are there?" There's not an answer because it does not have the quality of countability.
It's from a meme about an IKEA stuffed shark that gained traction within the trans community. It's actually what the instance, blahaj, this community is hosted on is named after.
I find it amazing how well the different fediverse platforms interact with each other.