they permanently closed my checking account for buying bitcoins ... in 2011. haha jokes on you now JPM!
My bank was much more polite, they asked me what I was doing because they had seen a bunch of people transferring to the same offshore account(mtgox). Had to explain what Bitcoin was but then they were fine with it.
[1] Yes, their name has a + in it, I was dumbfounded that the super-conservative banking system allowed that.
The joke is very rarely on the banker.