we generally stick to resi. I tend to set up mac filtering and some
encryption. i think that is acceptable protection. My general
description to home owners is that Mac ID filtering is like a gate
that checks your drivers license and encryption is like a lock. (i'll
give a little wep=door lock, wpa==boltlock, etc description) Then I'll
tell them that just like a house, if someone with some skill wants in,
they are flat out coming in.
last rack i did for an actual company had an 8X in it. I set the
router up wide open. I got their IT department involved from the start
and left it up to them to lock it down.