Devil's arrows? The infill walling of WKLB?

Seems to me there's a rational case for glaciation but it's proponents should have left it at that, as one possibility. Why over-egg it and say that human transportation couldn't have happened? Emphasizing the Millenium Project is a bit selective - it wasn't done right and they didn't have enough people, but there's have been loads of stonemoving replications all over the world that suggest it's not a big deal - it's even a sport in Spain.