Nickname said:
Say you have a deagle but no other gun. You are running around and you come up to an enemy and OH $#!T I RAN OVER ANOTHER PERSON’S GUN NOW ITS SWITCHING TO IT and now you are dead. If you had auto switch off you could have shot him with your deagle instead of waiting for your guy to pick up the mp5 with no ammo.
This is the cause for a death at every LAN b/c it always re-enables itself on my copy of 1.6 and I never remember to double-check it.