How stupid are people ? (don't answer, the question is rhetorical)
Firstly printing anything out is a security risk, that paper can end up anywhere - and it's a stupid waste of resources IMO
Secondly, forwarding anything from a government/business account to a private account is a clear breach of any normal security guidelines. Under certain circumstances I guess it could be justified as a one-off but to routinely act in this way is such a dunderheaded move.
In the course of my work I have access to client company confidential information. Not only do I not print off paper copies, I don't have any client related documentation or emails on my laptop - everything is on their servers which I access with remote sessions. I'm not savvy securitywise and even I know better than to forward work emails to private devices.