Don't get me started about the time I engaged in a revision war with the crazies over the Serial (Oxford) Comma. The Wikipedia page still has an "example" of where the Serial Comma "leads to ambiguity", but which is grammatically incorrect. All I was asking for was a single grammatically proper example to back up the extraordinary claim that the anti-serial-comma folks were making. They couldn't provide it but why does that matter when the revert button is so easy to press?