How do you change an ad?

My problem is, I open up an IMDB page, and the usual "Wallpaper" or "Background" ad pops up. However, occasionally the ad that comes up is an ad that for whatever reason, I REALLY don't want to see. I've had this problem multiple times, and I need a way to fix it. There has to be a way to ask for a particular ad to not be shown to me again. I realize that ads are necessary and unavoidable for a non-subscriber like me, but I would like to know how to ask that an ad not be shown. I can do it on almost every other website but this one, I think because IMDB does their own ads, instead of going through an ad service. This is still no reason why I shouldn't be able to make nasty, disturbing, or just stupid, ads go away.

Thanks for your help!