Encryption stuff in need of solutions

[Marco Martin]

On Friday 20 January 2012, Fania Bremmer wrote:
> 
> Of course this requires at least one non-private activity. But we
> discussed that already, that we might put the introduction activity as
> non-deletable and non-private.
> 

or, without having any "special" one, just checking at the act of both 
deleting and making private, if it's the last remained public activity, refuse 
to delete/make private
-- 
Marco Martin