Last night when new year taskpoints were given to those who were unidle and the
unlucky ones who were idling at the moment received orange cones instead. This
made me think of ways how to payback and one thought lead to another and then I
got it:

Add attachment option to mudmails, where one could attach item(s). No more
waiting when other party logs in to give/take you(r)
promised/repaired/sold/whatnot item. It could be a reason to give another use
for merchants' law-skill, imagine Bat meeting cash on delivery. Yet, it
wouldn't nullify the joy of meeting another virtual face to virtual face in
bat, at least when the goods you paid for ain't what you expected. Add some fee
to regulate sending whole castle's items.

Not only sending items could serve commerce but like the original idea was, to
return the spam to overdivine conebot(s) or for example in case of certain
goodie-good do-gooders who think it's perfectly ok to shove their wicked, most
likely poisoned foodstuff upon unsuspecting and innocent poor fellow players.