"Trolling amounts to hitting below the belt. We do not support those who display such aggressive nature. We do not support trolling and aggressive behaviour on the net," Mr Bhagwat was quoted in a series of tweets posted by Prasar Bharti Chairman A Surya Prakash who was present at the event.
Prasar Bharti is a broadcasting agency which runs Doordarshan and All India Radio.
Besides addressing the diplomats, Mr Bhagwat answered questions at the event organised by the India Foundation, a right-leaning think tank.
The RSS chief was also quoted as saying that the Sangh Parivar does not believe in discrimination.
"No discrimination and oneness of our nation and oneness of the world is our goal," said another tweet by Mr Prakash quoting Mr Bhagwat.
He told the diplomats that RSS runs 1.70 lakh service projects in various fields, including health, education, rural development, and invited them to visit these projects.
On relationship with the BJP, the RSS chief reiterated that the Sangh does not interfere in the party's affairs.
"Sangh does not run BJP; BJP does not run Sangh. As Swayamsevaks we consult and exchange notes but independent in functioning," said BJP national General Secretary Ram Madhav in a tweet quoting the RSS chief.
Mr Madhav, who was incharge of media and public relations of the RSS for a number of years before moving to the BJP, is a director of the India Foundation along with Mr Prakash.