Just now, I had the pleasure of following two cyclists for about 5 minutes, who were cycling two abreast along our rather narrow road - just wide enough for two cars to pass carefully, if they slow down. They clearly knew I was behind them (my car is not the most silent), but did not budge to let me pass safely (safely for them!) for a long time.
What are they trying to achieve with this behaviour? Make me mad at them? Try to force me to pass them anyway, so they can then rant on about those bloody car drivers who risk the cyclists' lives because they are in a hurry? Or at least make me honk my horn at them, so they can complain about the noise which is far too loud for folk who's hearing is not impaired by being encased in metal box?
Most other drivers would have done either of the above - but I have too often been in that kind of situation myself to behave as badly as that.
And now my question: What's the highway code for cyclists in this country? In Germany, it is illegal for cyclists to ride two abreast, unless you are in a group of more than 15, in which case the length of the row of cyclists would endanger the rest of the traffic more than the width of two cyclists next to each other. (Cars have to keep at least one metre distance between the outermost point of the bike/cyclist and the car when overtaking.)
Apart from that, I'm sure there's something that says that even as a cyclist you have a duty NOT to endanger other traffic, and forcing them to crawl along (they weren't even cycling fast, they were dawdling) is a kind of danger. Danger to the drivers' blood pressure if nothing else...

So what's the legal situation? I've often thought - could I at least point out to these kind of cyclists that what they are doing is not only dangerous and impolite, but also illegal? Of course, if it isn't illegal, I'd better keep my big mouth shut, and seethe away quietly...