why does the old key have to be NOT any older usage than 30 days? (when recovering by signing with old and new keys) Many people have intermittent lifestyles, they drift away from usage of a system or

I don't think I've ever used the word "as" 4 times in two sentences before. 5 times. (And in 1 sentence. :D)

what i'd like to know is... how can a full node, reading the blockchain, and trying to validate it, possibly tell whether all the accounts claimed to be spun off out of Facebook or Reddit really were spun