Whether Banksy is a woman or a man, this writer doesn't seem to have a clue:
Girls and women figure into Banksy's stenciled figures, for starters, something that isn't true of 99 percent of street art.
Wtf? Has he looked at any street art, or is he mistaking a gang sign on an overpass as street art? Other passages also seem to conflate tagging with street murals. It's hard to give any theories credit when the source seems like it isn't credible.
UNRELATED BIT: Are you still in OK? If so, check out Welcome to Happiness at the deadCENTER Film Festival. It's playing June 13 and 14 in the early evening.