If government officials don't care about parliament sessions and are playing games during them, the noise of their keyboards is the least of your problems. I think typewriter is a great way to express that. You can't play games on it, unlike iPad.
Whenever I hold a workshop or longer meetings, I always try to give 5-10 minutes on every hour so people can "reconnect" with their email, news, social network, or whatever it is that is trying to occupy their mindshare with me.
I've noticed a marked increase in engagement whenever I allow this. I know that the people there should be paying attention, but in practice they are incapable of it.