Tsk tsk tsk. Now the rider should have known better that a fire (water) hydrant is not for securing a bicycle. I believe this is illegal. Not only that, it may be fatal in a fire. I don't care about fatality to the bicycle. It's human fatality that I am concerned about.
This cyclist obviously thinks of his/her own convenience at the expense of risk to others. This person should be banned from owning a bicycle, or any vehicle, for that matter. No telling that he/she will not chain his/her car to a fire/water hydrant next.