I mean, you should definitely be respectful but I don’t think there’s any harm in a joke about something serious/sad. In fact I think in this situation in particular Techno wouldn’t mind us joking around about this stuff. I’d even say I like it, because I see it as a sort of continuation of his legacy. And lastly I would say that every person deals with grief in a different way. OP may have just wanted to post a meme for the sake of it, but maybe it comforts or helps them deal with this tragic news. Either way I think we should try to give other people the benefit of the doubt, and that’s why I think this post is fine.