Just Be
I'm probably going to echo what others have said and I also don't (if I'm reading it properly) fit into the 'category' of people this is aimed at. But I don't think it matters. If you like somebody's writing then you like it. If you highlight examples that you think are a) well written, b)sexy or c) you just like the phrase or whatever, then just say so.
Half the time (if not more) I read, like and comment on things and then think... oh, I better check who wrote that, so I know who I'm talking to. I would also venture to suggest that there is writing on here by people that most of us don't know are LGBTQ+, bi-sexual, hetro or whatever else other classifications there are. I always think of Prose as a 'safe' space and would be upset if somebody viewed a like as a 'leer'. Most people here genuinely appreciate feedback and most feedback is genuinely sensitive. I'm not sure that anything needs to alter that by making people feel uncomfortable about commenting on certain pieces of writing.