I think if platforms habitually or consistently cause 'bad things' to go viral then the ownership and management of those platforms should be examined, and if it's determined that their ownership/management may be beholden to interests contrary to the welfare of the nation then sanctions should be applied, which may or may not include a ban.
There are well understood exceptions to free speech and freedom of association that apply to the ownership and control of companies that could significantly affect the welfare of the nation. See:
https://en.wikipedia.org/wiki/Dubai_Ports_World_controversy
Please answer the questions that were put to you:
Approximately what dollar value of damage was done to schools as a result of the 'devious licks' viral videos trend from last year? And on what platform did those viral videos trend?