Going AFK mid-conversation

[Rhassalan]

So, a situation cropped up. Not naming names but as an antag I was conversing with a character and while they were moving I stung them (as changeling). The person falling over was witnessed by another as they fainted so I ran with the body. Chase ensued which I was enjoying and, in the end, I was able to escape with the body and absorbed them. After this I get a hivemind message of 'I was AFK. I thought this was RP.' Not once did this person state they were going AFK. We're not talking someone standing in a corner with the SSD tag in the examine, but someone who had been talking and moving moments before.

Now, the question is.. should it be up to the Antag to know the person is AFK or should the other person STATE they are going AFK?

It just leaves a bad taste in my mouth because what's stopping someone from just pushing their keyboard away the moment something happens and saying 'Dude! I was afk!' the moment it's over.