I created a fork of a repository and then deleted it. I would have thought the journal/activity would indicated that I deleted that repository, but it didn't.
I am going to call this an enhancement.
I'd like to see this minor feature with the date/time it was deleted. Since repositories/forks are cheap I like creating them on the fly often (or forking). Then merging them up to the main repo and with the current setup of RhodeCode I'd delete the old repo. ... just as an example for a use case for you.