>Anyhow, from being in groups with people who do scan multiple
>directions at once, it appears that most of them use aliases
>rather than 'scan all'.

It might be worth noting that the use of "scan all" spams six lines to the room, of the form:

XXX scans north.
XXX scans east.
XXX scans south.
XXX scans west.
XXX scans up.
XXX scans down.