Are they really nits at sub-50NL? In that case turn it around - rob them blind. If they are really waiting for sets to put their chips in you can pick up lots of pots on the flop when they c/f unimproved. If they wake up and want to make a big pot, get out of the way unless you have a setbuster (hidden straights ftw).

This is not at all what I remember the lower stakes to be like, though. In my experience they are all calling stations. True, this was a year and a half ago, but when I was sweating my lil' brother on FTP 10NL the other day the tendency definitely was that they never fold. Maybe you could work on your table selection?