Well, we can all of us be rude in our different ways, I suppose, and some people are OK with lateness and less happy with constant sarcasm. Still, sarcasm at the board is still a rare event, whereas, if we take my experience as indicative, lateness at the board is anything but.
You have plenty of time for thinking, while you're waiting for your opponent to turn up, and what I was thinking about, much of the time, was the zero-tolerance rule in chess, which, you'll have gathered, didn't apply in Sitges. It's not that I agree with the rule, as such - I don't. It's not necessary. But I agree even less with people whinging about it to the extent that they do.
See, when people are complaining about how unreasonable it is that they can't turn up late when they want to, I'd like to see a bit more recognition that you're not making an appointment with yourself here, you're meeting somebody else, at a time previously agreed. If you don't turn up on time, you're messing them about. Sponsors, spectators, team members, opponents, whichever may apply to the particular level of chess in which you're participating.
Yes, yes, the clock gets started on time (or ought to) and the opponent gains some minutes over you. But suppose that's not your call to make? Let's suppose that you're a social player, not a professional. Maybe your opponent would prefer that the game actually started on time, a time for which they themselves have managed to arrive. Maybe they want to get on with the game, not be kept hanging around not knowing whether they're actually going to get a game or not. Why is that an unreasonable expectation, but perfectly reasonable for you to rock up at the board whenever suits you?
Lateness gets on my nerves, and culpable lateness much the more so. Yes, circumstances beyond our control - the train was cancelled, the car broke down, the dog ate the map you'd printed out. This is why I'm not in favour of compulsory zero-tolerance, though I'm not all that opposed when it comes to professional-only events. If it's a job, aren't you supposed to turn up on time?
For the rest of us, I dunno, maybe I'd like a shorter cut-off time, though I suppose that if we did, it would amuse the perpetual latecomers to turn up just a minute or two before the deadline. But anyway, the point is less a rules-related than an ethical one. You're a social player? This is, therefore, a social occasion? Then have some consideration for your opponent and don't keep them hanging around. Eh.