Yeah, that I don't get. Critique is part and parcel. You want ouch? Try handing in a screenplay to a (professional) producer and have them tell you they "hate it." I've been there, no fun, but you take your lumps.
There are lots of nasty comments on TTI but we don't remove them or even argue (albeit we have deleted a few comments that are just cruel or nasty, sexist, making fun of the actors by name or with ethnic slurs or what have you). We do occasionally point out when a comment is inaccurate (as when someone commented that Harris's skirt was shorter than anything ever seen on TOS, and we posted a link to a photo of Helen Noel's even shorter one) or inane (which I typically respond to with "Put. The. Tranya. Down"). But, by and large, if people say "it sucks" or "the acting is terrible" or whatever, we just grin and bear it.
You can't tell people what to like, after all.