Re: The 'two wrongs make a right' argument.
While I agree with your sentiment in principle (that two "wrongs" don't make a "right"), if Corbyn has voluntarily waived his right to privacy by publishing "selfies" of his journey, then it can't really be argued that Virgin have breached said right by publishing additional footage of the same journey (not having seen the footage, I would hope that they did at least blur out any other passengers! [or obtain their consent]).
"...and why couldn't Corbyn have been a bit more organised and reserved a seat? His lack of planning does not justify renationalisation of the network."
Because *terrorists*, obviously! :)