Don't think it's about age. I'm also considered old (in the technology sphere at least) and I don't really enjoy the "emoji" humor either, but I don't get mad about seeing them. Let others have their fun, no need to get angry about things you cannot control.
I think I'm old in that I was thinking how would I write this emoji email address on paper. Also I can just imagine the joys of form validation when you add an emoji into the email address. On the other hand I doubt most email harvesting bots crawling the web would be configured to recognize an emoji email.
