I specified any campaigns - any that are relevant to changing the current status quo, whoever or whatever the campaign is aimed at. Presumanbly it would ultimately have to be against both - even if the givernment turn round and say it's nit illegal to pass your ticket (not for profit) to a mate...
OK, I should have specified ordinary tickets, not season tickets, for the train analogy. Still the same priniple for T&Cs though - just wisely and correctly not applied. And your example from the Argus was selling tickets illegally for profit (and obtained illegally too).
So, laws can be...
There's every reason.. Many places didn't used to admit women (or let them vite); following campaigns they do now (changes in both the law and T&Cs). People used to smoke everywhere; following campaigns, they can't now. Other places insisted on jacket, collar and tie, but following protests have...
Legally, I believe you aren't allowed to sell on your ticket at a profit (unless you're a well known firm that routinely buys blocks of tickets for concerts, etc., and sells them in for enormous profits). It's more a case of T&Cs causing the problem - this is nothing new it has been a standard...