(Bismarck) Car-sharing is a form of torture. I'd rather travel in a packed rush-hour train where anonymity rules and talking is taboo anyway. But in your own car that cannot hold. Anyone who spoke would be immediately shot. Of course this only applies to work journeys. Anything else - well, jump in.
I think my swearing at other drivers would quickly put anyone else off car sharing with me. Sometimes even I'm shocked at the foulness of it. The weekly offer in Aldi this week is a dashcam, and I considered buying one for a moment, before realising that it would mean my expletive-laden judgements would be there for all to hear.
Why not use a dashcam but speak in mock Russian? Youtoob fail videos are twice as funny with someone shrieking "Smirnoff spetznatz gorky!" just as the four articulated trucks up ahead disintegrate into their component parts and show you that while you thought the traffic was doing around 50mph from the footage it is actually moving somewhere in the region of 110. In deep snow. In a near blizzard.
You could publish the footage as The Perils of Penelope Somewhere In Europe.