Sometimes I remember to put "constructive criticism welcomed" on my WIWs but not always, especially if I post them from my phone. Unfortunately, there are so many of us now that I doubt most of us can remember all the members and how they prefer to receive criticism, what their style is, what other budget/religious/body-health issues they may have that limits what they can or want to do with their clothes. That makes it hard to know how to respond.
I've long thought that YLF does an admirable job keeping a balance between criticism and "too-nice" culture. It's so hard to do online, hard to do with a community of women, and hard to do about clothes and image. Honestly, I think we all do pretty well; I too remember the old days of alt.fashion among other places and it was a pretty crazy place to post and read. Most internet communities are dysfunctional in some way and I think YLF Is one of the saner and more genuinely caring ones.
Idea: what if there was some sort of link we could have from our profile/posts that states what kind of criticism we find helpful if any, what our style goals are, etc.? If we had it in a one-click place accessible to newbies and oldsters alike, it might really help. Even figure types, height, and/or sizes for those who want to - I've often thought oh, I wonder if that item would work on me too and then have to ask someone about how tall they are (it's hard to tell in photos!) where I'm sure they've shared that before.