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Long ago I received an email with same sort of contents. I knew immediately that something is wrong there. When I checked the email address then I found it was from a random email address.
Problem is easy going people falls for this kind of scams.
True but posting a comment on their official post with an account that looks exactly like their's is something to worry about. One wouldn't realize how different are these two services unless they check the other account out and review it. Anyway, it's our duty to spread the word.