It's completely your choice if you want to or not. But do you HAVE to... I'm going to say no because it's nothing bad, and there's nothing to really announce.
Granted there is an explicit side to the fandom, but that's very select in my opinion. But I can poke a few holes in that... Counting how many Treky's there are out there I seriously doubt they don't get fresh with each other when no ones looking.
Anyway... my point is, it's not really a big deal, and it's nothing really worth making an announcement about. UNLESS, you want to, or you're afraid your parents might find out and do an internet search. If you want to, and you need help, we're here to help.