BSNL code injection incidents. Many of the BSNL users have experienced this.

Whereas malicious and unsolicited ad-website open randomly on any website.

Such kind of tampering with data is illegal with respect to IT Act.

It also violates data privacy. BSNL is using some kind of adware, by which malicious ads pop up on unsuspecting users.

This has been well documented by Internet Freedom Foundation here: https://internetfreedom.in/venom-venom-venom-bsnl-engaging-in-code-injections/

Browser hijacking is a form of unwanted software that modifies a web browser's settings without a user's permission, to inject unwanted advertising into the user's browser. A browser hijacker may replace the existing home page, error page, or search page with its own. These are generally used to force hits to a particular website, increasing its advertising revenue.

I request the authorities to take cognizance and remove this tampering of our digital rights.

More evidence: https://medium.com/@ankitduseja/indian-government-owned-bsnl-broadband-is-injecting-ads-in-websites-and-how-you-can-protect-e813c49b93ac