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I enters in a chat room every day . But last Saturday I did not come here . But a user having the same name as mine user name was in the room . some people was chatting with that user . But as I was not in the room , I should not get the notifications for chat messages for that room. Today I received a mail from stack-overflow as notifications for those chat messages . I checked it out but that was not for me . These were for the user having same user name . Is it bug??