I don't write nor do I usually rec (to be honest I don't read all that much fic lately) but I know I'm irritated when I'm recced a fic through a link only to find it's locked.

I can understand a community or whatever that has age limits to join as liability protection, but I'm not going to friend someone just to read a fic. If the linked rec is noted as locked, I usually don't even bother. It's a passing and largely minor irritation, but it flares up briefly nonetheless. YMMV, of course.