I'm going to be charitable here and assume Hunter Pence's hashtag "#Bansky" is either ironic or betrays an inside knowledge we don't share. Because when street-artist Banksy rolls up on a major American city, it tends to be a big deal and he usually doesn't paint very earnest portraits of American sport figures.
Or maybe there was no typo, and San Francisco street artist Bansky is responsible. In which case, please pick a better name. Here's a suggestion.