I pride myself for being restrained on the internet... or at least I kid myself that I am.
But, there's one advertisement that has been irritating the living daylights out of me because instead of just being at the top of each page, as all of the other nice ads are in the 4" square or so space provided, it repeats itself 5 or 6 times down the page. This means that I can't read the first two or three postings of a thread. It's always the same ad, so if I refresh the page enough times, it will cycle to one that doesn't do it.
I thought at first it was a problem unique to my Mac, but now that I'm bored at work, I see it does the same thing on a PC.
And yes, I'm aware that this is a free service that needs to be paid for. I just wish there wasn't a glitch in the programming of this particular ad (also, as I'm a little conspiratorial, it comes as no surprise to me that it's a political ad).