Someone made a point about grammar and spelling mistakes... They were rightly flagged as their comment was non-constructively rude. However, it is a real point.

Someone made a point about grammar and spelling mistakes... They were rightly flagged as their comment was non-constructively rude. However, it is a real point. Grammar and spelling error patterns are something I would attempt to fingerprint in order to correlate users across different forums if I were running a surveillance programme with sufficient resources.