If their aim was to produce a usable car, and they end up with only 1.2 km/l then they have screwed up.
You can't go shouting at schools kids at science fairs for failing to do something great, but you absolutely can if professionals are set a task and come up with lousy results.
I kind of agree. But I think it's on a case by case thing. But usually I just ridicule the person and pretend in my mind that I could do much better if I wanted to.
It currently does teleport your inventory. I'll look into whether you can prevent that. I can also turn on mobs and per world it seems which sounds like what we want. I can have 2012 as being whatever we want, survival with mobs by the sounds of it.