In my stint with the Weavers in '63, we never used separate
mics but one central condenser which we attempted to choreograph
around. Lee Hays had to duck and complained bitterly about
my inability to swing the banjo around nearly missing his head.
This is probably because my strap was around my left shoulder
over my neck whereas Pete always had his strap loosely draped over
his right shoulder allowing more mobility. Earl Scruggs does
this as well.
Changing strings can also be hazardous if it breaks and
can hit you in the eye while tuning them up.