The sock issue was covered a month or so ago when kl shared an update with us:
In important breaking news, socks are the latest addition to the list of unacceptable winter running clothing.
He was later able to clarify the situation:
I was surprised as you, but I referred the matter to the Hardness Committee, and they said, 'Yes of course it includes all socks it's not fucking Norway there isn't any snow in the ground they're feet not fucking hands that do fucking dishes'. Pretty unequivocal really, though there was talk of exceptions being made for runs upwards of 2 hrs when winter arrives.
Hope that helps.