I didn’t want to be the first to say it, but I agree. Claiming a name on hex is bad. You should have been sure that it could be reversed before publishing it.
Regarding the prank, you should never assume people will see through a prank on the internet, especially when such people might come from a completely different culture or have a poor grasp of the language you’ve written in (I’m not saying any of these was at play here, this is just a general admonition).
In my opinion (and this is a very subjective topic), a new forum tolic would have been acceptable, as would have been a new github repo, but claiming a hex package name is in really bad taste. Changing the title of the topic was also kinda bad, but I can see it wasn’t your fault.
These kinds of pranks only work well in a broadband communication channel (like communication in real life) in a relatively homogeneous community. Communication through text with strangers on he internet is as far from the above as you can get…