Paid mods possibly done right. I've no problems with the idea (though I won't buy any myself), but the way they introduced them last time was just so slap dash, ill-defined and amateur it was... Well, typical of Bethesda actually.
@Abomination713: I don't know what the speed limit is in the USA, but 80 mph is easily controlled. 88mph isn't much worse. So long as it isn't a residential area... Sod it.
Besides, as BttF2 says, a DeLorean is made of tinfoil compared to a real car, so the main people in danger are in the car itself.
@nbf4548: As I understand it, Carmack did the initial work himself, but on company time, using Zenimax's resources. By just about every contract going, that means that his work there belongs to Zenimax.
Golden_Gonads' comments