There are also music-related threads to which people inexplicably add the "BS" prefix, to wit:

BS: Folk Scare Film by Christopher Guest
BS: learning the fiddle
MusicalBS: Bagpipes in America
BS: South Yorkshire Carols
BS: Married: Greg Brown and Iris Dement
BS: Unofficial Song Challenge!
BS: Stripped truss rod nut (about guitar repair)

These were all active in the last week.