[[-NM-] cal70d]

I only use Steam ID's to add admins. If they are legit steam users, it won't change.

Names can be changed on a whim, so it's not a good way to add admins. I don't care if you 'can' add them this way, you shouldn't.
Steam ID's are unique, whereas names can easily be duplicated.

I have some admins that change their name almost nightly, but they always have their admin rights because I added them using their Steam ID.

If you don't know how to find your own Steam ID or other's that you wish to add, a simple way is to use HLSW to monitor your server.
You have a friend that you want to add, get their Steam ID from HLSW the next time they are in your server.