That is one creepy picture. I never said anyone could use the word "dude" as gender neutral. From now on, when referring to a female with any form of that word, you shall refer to her as, "Dudette." That's a rule.
I agree it’s not, but it’s fairly common for females to be called dude. I don’t really care, but I doubt a guy would be okay with being called sis. For the record I don’t really like being called dude or sis, not that that matters.