It could have been an honest mistake, a simple typo. Either way you knew exactly what the person in question meant, you just used it as an excuse to try and belittle him/her.

Did you get bullied in school by any chance?

But yet not quite as sad as posting on a message board pretending to be French.....

Now, now, let's not keep giving him the attention that he quite clearly craves so badly.

I liken Jean Capdouze to that bald bloke you know that is clearly bald but continues to let the hair strands that are left, grow at the sides and put hair gel on them. You can tell him all day what he is but he'll never know or more importantly listen, then one day the penny will drop & in this case he'll stop posting