It is almost as annoying to others as taking a bike on a bus.
The bike is for biking. Of course it is annoying when people bring it on the bus. Or park it in front of my door.
The bike on the metro is not rare because it is annoying. People do simply not have that much tact. It is more rare because people bike those distances and you pay extra on the metro. It is free on the S-Train which also covers longer distances - hence more bikes.
I find bikes annoying in general as well. But that is because they are usually attached to a human.
The point was that it can actually work.
It is not all of nothing. It is an integrated system which actually works.
This was a reply to a comment which claimed that bikes could not work in a large city with a lot of bikes and public transportation.
The same people often argue that bikes cannot work in cold weather.