And most of you ... should be able to decide from the name of the person in the thread title whether or not it is folk-related or not, and open it or not accordingly

Not if the name means nothing to you. I had never heard of many of the names that Shambles has opened birthday threads on, and as his first post usually only gives their date of birth, it leaves me no wiser as to the person's contribution to the sum of human happiness.

It is not until somebody else comes on and adds some useful (usually musical) information that the thread becomes meaningful. Some of the "unknowns" have turned out to be folk, but many of both the known and unknown names come nowhere near anything I would recognise as "folk". The net is cast exceeding wide.