Idk, I’ve never thought to specifically ask for concrit on my fics but I’d still appreciate any I received… That said, I also understand what you mean about launching into a critique about something someone wrote for fun. But I don’t think it’s a rule that only those who specifically ask for it would welcome it.
if you want concrit, ask for it. if it’s not requested, don’t fucking leave it
IMO if someone asks for con crit and you have any place to send it other than a comment on the fic, that’s where it should go. The comments section isn’t critic’s fuckin corner; it’s squee-town, population: excited to be here
Beltainefaerie's Flights of Fancy 