On Sunday, 16 October 2016 17:18:12 UTC+2, Mike Collins wrote:

Almost all the people I see doing this are middle aged or older.

It can make you old before your time!
I tried it once and didn't like it.
It kept howling in the earphones because the garden is full of old, iron junk. Probably from hundreds of years of agricultural occupation by obsessive, scrap metal farmers!