Hmm, i am not quite sure, i suppose that if you block a player it just means that they cant trade with you but if you foe a player then that means that they cant trade with you as well as having any contact such as PMs. I hope this helps! ~Deadly Nightshade~
there is no difference of blocking or foeing a user because when you block a user you foe them. well the only difference is that you can block some one with a trade . . . hope this helps a bit