Personally, fwiw, it is non-use rather than non-writeup that bothers me; so no, paco would stay - those who would go under my suggestion would probably never know because they wouldn't have logged in since their computer had sideburns and a velvet jacket!
How does paco not qualify for non-use (excuse the double negative)? The last login was six years ago! Perhaps you have a looser definition of non-use, but that seems pretty not used.
thor
Feel the white light, the light within
Be your own disciple, fan the sparks of will
For all of us waiting, your kingdom will come
paco posted (albeit once) and got lots of replies. Reading between the lines of other posts, at least one reason for keeping him is referential integrity - (not allowing all those replies and votes to be orphaned) - there are obviously other reasons too .