The guy behind me on the train this morming was traveling by himself. Other than the 15 minutes he spent loudly participating in a settlement conference call (violating client confidentiality I might add) he was perfectly quiet. There was no evidence that he was a compulsive chatterbox, he just found it convienient to take a call right then and didn't care how many people he bothered.

While it is true that other people have been very annoying on the train by talking to each other it is not true that banning telephone calls would have no salutary effect.