Anyone who spends more than few milliseconds reading Internet forums and unmoderated comments discovers that the anonymity of the Internet encourages some people to make the kind of inflammatory remark they'd likely never make face to face. If called on it, some people "apologize" (not) by claiming they can't help it because they lack social skills. Apparently some go even further, pretending they have Asperger's Syndrome, a recognized psychological condition. Being an Aspie is supposed to be some sort of trump card to cut off criticism.
Personally, I expect that very few of these claims ("pretend" is Norman English for "claim") are valid.