This a rich expat, sitting in first class eating, so if he did get caught and fined by the MTR/KCR then he's OK with it.
BUT
If he had spilt sauce all over the seat and the seat had to be replaced, he'd cry blue murder, come on Geo of all places to seek legal advice, and then get told by some that its OK and he shouldn't have to pay for replacing the seat, just the fine, as there's no signage about the cost of replacing the seat, as they are sure that the MTR/KCR will give a few beers to a company so that they'll bump up the price on the invoice.