[Info-vax] purging another user's mail from a semi-priviledged account

[Phillip Helbig---undress to reply]

>From a process with these privs:

Authorized privileges:
 NETMBX       OPER         READALL      SETPRV       TMPMBX

Process privileges:
 NETMBX               may create network device
 OPER                 may perform operator functions
 READALL              may read anything as the owner
 TMPMBX               may create temporary mailbox

MAIL> PURGE will purge the current mail file even if it belongs to 
another user.  Presumably, MAIL makes use of SETPRV to do this.

Is this expected or surprising?