Of course you're correct, you've paid for your seat, **** everyone else.
You're entitled to get up, fart, read the programme, run up and down the steps, phone your mother, then sit down again, get up, go for a piss, and repeat...
But you'd be a complete and utter dickhead. Can't see many fellow fans appreciating you.
You're not the only one who has paid for their seat ffs!