[kelnos]

I flag most complaint posts, unless the complaint actually brings to light or discusses something surprising or unique that can be generalized and discussed.

I generally find these posts pretty boring, and most comments on them are people recounting their own stories about how that (or a similar) service screwed them over. I suppose they can be a decent way to warn people off of a particular product (scammy, terrible customer support, whatever), but that's not what I come to HN for.