Anyway, Baycon has a pirate theme next year! I'm going to list every pirate themed (not pirated--that's different) anime movie/series I can think of, and any additions are most welcome!
Captain Harlock TV series
Queen Emeraldas, Captain Harlock: All movies
The Enemy is the Pirates!
One Piece
Elemental Gelade
Laputa: Castle in the Sky
Mars Daybreak
Outlaw Star
Peter Pan no Bouken
Porco Rosso
Stellar Buster Mito
Legend of Basara
Tide-Line Blue
Black Lagoon
Sol Bianca
Green Legend Ran
Nadia: Secret of Blue Water
Space Pirate Mito.
Desert Pirate! Captain Kuppa
Disney's Treasure Planet
Disney's Peter Pan
Even vaguely piratey will do. Thank you.