How anonymous is Reddit really?

Suppose I live in a country where free speech doesn't exist and I decided to bad mouth the govt on a throwaway reddit account, can my post be somehow traced back to my IP, MAC, etc if the Govt forces Reddit to give them the deets? What are the limits to Reddits anonymity (apart from me voluntarily disclosing identifiable information I mean)?

account anonymity anonymous back bad can etc free free speech live mac privacy reddit speech