On 2015-10-04 13:17:54 +0000, JNugent said:

Because they could be at risk from fellow "passengers".

Are you unable to understand that?

They could when riding a bus or train, as well. Many people choose
daily to do that without incident.

Nobody is suggesting making this compulsory, simply making it a legal option.

Neil
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Neil Williams
Put my first name before the @ to reply.