That's why when I have turns like that I just look up and ask 'Does anyone have a way to stop me, or do I just win?'
Sometimes they'll ask if you have the win condition in hand, and I can either say "yes I already do" or "no, but I'm set up to draw at will and can get it without problem."
Sometimes they ask me to play it out (not really having paid attention), and after a few more casts they see why it's a foregone conclusion.
I love my Seton deck, and I'd hate to see someone else give up on a great commander like him. So long as you move through your turn fast, it shouldn't be too terrible for the other players. It's those artifact / cascade / extra turn / constant tutor + shuffle combos that I hate to watch someone go for because those 10 minutes consisted of like 6 spells.