I've seen six out of the hundred: Cheaper By the Dozen 2, Surviving Christmas, Deck the Halls, Date Movie, The Fog and Godsend. And I would only the dispute the inclusion of one of them, which is The Fog (a 2005 remake of the 1980 John Carpenter original). I thought this was a passable enough horror, no worse than any number of others I've seen. In visual terms, it was even a cut above most.
Surviving Christmas is the one that stands out to me. I think it must be one of the nastiest and most misanthropic movies I've ever seen. There was something uniquely bleak about it-- I felt tainted walking out of the cinema.
I'd love to see Battlefield Earth.
I paid to see all but one of the above movies. I left Cheaper by the Dozen 2 after about twenty minutes. I sat through all the others, for some reason, even though I often walk out of movies early.
Here is the list. I've just realized it is in fact only the worst movies of the decade prior to 2009.