We also get sponsors, and they get a logo that flashes on screen every now and again.
Honestly I think I'd get much more annoyed with a logo flashing on the screen while I'm trying to actually watch the game, as opposed to their being an ad-break and getting them all out of the way while the game is on hiatus. I know I get really pissed off when I'm watching something on Fox(like Simpsons or Family Guy) and they'll have the corner of the TV taken up with some advertisemant or another for a new show. I'm like "Helloooo, I WANT to be able to see the whole picture, and not be distracted ya know".