Very likely scrap peddlers. We are having big problems with people
stealing lead off roofs, plumbing from empty houses and even metal
fences in the UK. Price of metals is very high so scrap value is also
good.
They probably think they have gold in them that they can profit from.
Little do they realise the boards in SEs and SE/30s don't have any
IIRC ;)
--
Mark Benson
http://DECtec.info