Here via browngirl. I completely agree with your main point that the kind of sexual harrassment under discussion requires social skill and should not be excused by social awkwardness (or anything else).

But I quibble with your last paragraph. I don't think it's useful to define social awkwardness as something that manifests in all environments. Some people are socially awkward only in some environments, are socially awkward and still have some friends, and don't always/to everyone come across as creepy.