Aamir Khan says he will soon post his first message on microblogging site Twitter but before that he plans to do a live chat on Facebook to keep the impostors at bay.

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"I've been using Facebook a lot... the problem is anyone can be an impostor on the Internet. So I am thinking of a live chat on Facebook so that people will at least know it's me and not some impostor," said Aamir here.

And the reason for the actor's concern is genuine.