Mac,
'cause the average punter is going to call me like crazy when the windoze firewall is activated through a windows update and starts having arguments with their install of Norton Internet Security or whatever s/w firewall they already have.
Or starts denying access to/from other computers on their home network without any apparent reason (to them).
I just think Microsoft should have a warning of the possible consequences if it is switched on - it isn't always the right choice.
Something along the lines of "Windows has detected blah blah blah and if you say yes you might grow an extra nose etc etc." - add a "recommended" choice for the average punter, and you're done.
Just my opinion anyway,
amofw
ps. hope the sun's still shining down there - I'm off soon!