Thought I'd share my experience, this is the kind of thing I thought you only saw on Reddit: http://i.imgur.com/lH5UIAm.png
One of my recent purchase orders: http://i.imgur.com/or13Khj.png
Original email from when I created my account: http://i.imgur.com/h8vyMkg.png
Not looking to start any trouble here as I believe Coinbase is a company really breaking some ground in many areas of BTC trade, but this sort of random suspension out of the blue is not really acceptable.
Edit: Contacted their support and haven't heard back in about 10 hours now: http://i.imgur.com/fPa5gb5.png