In the /who case, a -inactive tag would be especially useful. I cannot count the times I've needed a rez, do a /who and see lots of people, and call out... and get no reply until I post on Uni and a friend teleports in to help me. Such a tag would, of course, be complex to program.
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Remembering Tyneetryk
Phaedreas Tears - 15 years old and first(*) of true neutral guilds in Atys.
(*) This statement is contested, but we are certainly the longest lasting.
<clowns | me & you | jokers>