I often give food to others since they keep
forgetting to resupply. And I doubt it would
be healthy to eat poison, even if it was
meant for the bloodstream.
Of course you can RP it, but it would probably
be as popular as RPing fights.
It's in no way necessary to implement it, just
something fun to do with the poison. As it is
now it's rarely used. I myself only use it when
the trashbin is too far away.