Remember those friends you forgot

Could this be a way to reduce the isolation faced by the severely
mentally ill?

What if every once in a while people went through their memories or
their phone book and contacted friends they forgot about. It may be
interesting to see just how many of those forgotten friends are mentally
ill.

It would be a nice thing to do whatever. It's a shame we don't live in
the sort of society where simple ideas like this ever get done.