There are many guilds with the name Pirate, and that was before the idea of another job was even know. And the July patch released NLC last year so it would make sence if Nexon releases an expansion in July, thats the anniversary I'm talking about, and thats also why I say Masteria.
SEA does NOT have pirates-
http://strategywiki.org/wiki/MapleStory/Patches
And who says that guns are bad? Policeman have guns too. The reason they nerfed Showa was probably because
1) you're kicking the crap out of 'humans'
2) they are in a gang
3) GANGS EXIST. OLDEN AGE PIRATES DON'T. Therefore, common sence says you can join the 'gang' that you beat up in MS but not become the 'pirate' you played in MS.