[fysiks]

Steam has taken a big step in assuming that there will only ever be one Steam account on a single computer/OS. This may be more common now with relatively inexpensive computers but it's not always the case.

I've known people who have let their child play on their account and I don't see anything bad about it. When this happens, you probably don't want them to have admin access. So, using SteamID and password is not entirely a stupid idea.

However, if they have it in their config file then it doesn't make any sense because that file will be executed regardless of who is physically at the keyboard. The logic will only work if they manually type the set_info into the console before connecting to the server.