It is possible for the thread's owner to ask staff to delete the search thread after its purpose is done. P: I think I'd rather see that encouraged more, instead of just making a whole new board to throw them out of sight.
I guess I just really don't like the idea of sub-boards on Res. These suggested ones always seem so specific that they would encourage people to start making certain kinds of threads more, or that such thread-fads would never fade out like they usually eventually do. Something general like the Fanclubs board was pretty nice, as it encourages communication on non-Res things and allows people to become closer. But a board for a very specific kind of thread that might not be so prevalent in a year or two if left alone? No thanks.