The Supreme Court upheld the Delhi Assembly panel's right to summon Facebook. New Delhi: Observing that digital platforms like Facebook have become power centres with ability to influence opinions, the Supreme Court on Thursday said they must be accountable, adding it is difficult to accept the "simplistic approach" adopted by Facebook that it is merely a platform posting third party information and has no role in generating, controlling or modulating that matter. Further observing that the national capital can ill-afford any repetition of the riots witnessed last year, the Supreme Court stressed that ''unity in diversity'' of India cannot be disrupted and the role of Facebook in this context must be looked into by the powers that be.