I agree. Most of the old threads should be kept. Some daft ones like the 17th thread where someone has asked for Veronica Zemenova pics or whatever, and they have been referred to a different thread should be deleted. But the large archive-type threads shouldnt IMO.
Example, all the old guys remember BIGTIMERS4X4. He had a large Christina Aguilera thread that hasnt been posted on for ages, and had loads of pics and links to the lady herself. I dont think threads like that should be deleted. If someone actually does use the search function properly, then they will see that thread and hopefully bump it back up where it will garner more attention than a new thread created that says 'Aguilera pics wanted' or whatever.
One thing I must say though, is that if there is going to be a mass cull on large threads with lots of pics, then there should be a stay of execution for the brilliant "Post Your Artwork Here" thread in Freeones Talk. I reckon threads like that and the "Dont' be shy guys" or whatever its called should be kept, as they feel like they actually create and encourage a sense of community and belong to the members. The 54th thread saying "Post pics of big tits here" doesn't have the same justification for taking up loads of time and space.
Well, thats my humble opinion on the matter...