Coming home from work last week I was behind a row of slow cyclists, people moving so slowly I was not peddling except to keep myself upright. I would have moved past them but there was a fairly steady stream of cars on my right so I kept in the cycle lane.
Then the cyclist in front of me made an unsignalled right hand turn into the stream of traffic just before a roundabout. I turned in horror wondering if she would end up under the wheels of a car (which she didn't, some nifty dodging took her out of harm's way) and while I watched I cycled straight into the metal bollard her bicycle had been obscuring. It hurt. A lot.
So, a cautionary tale. Don't get so involved in the suckiness of others that you fail to recall you are a road user yourself and bollards may be lying in wait for the unwary. Oh, and kudos to the clycist behind me who stopped to see if I was alright. You weren't at all sucky.