FB is a detriment to society, but this is primarily due to capitalism's flaws, which entices profit above all, and even punishes those who stray from this dogma.
(A board must remove a CEO not on mandate, shareholders will sue if they do not, etc...).
Everything has flaws, needs to be tweaked, no engine runs without maintenance. We handle this aspect of capitalism with regulation, patching an inherent flaw where required.
Banning a social network would only see it pop up elsewhere, perhaps in a place like China or Russia, with all of the censorship and state controlled manipulation this implies. Think Facebook is bad? Imagine all of Facebook's issues, with no spam control, no privacy legislation, plus members of the state on the board, and state sensors filtering posts, and injecting state approved data.
Destroying Facebook is ... nuts.
Instead, create a level playing field for all via regulation, tweaking and fixing the for-profit motivation which leads to bad societal outcomes. (And, keep positive for-profit motivations, edited to clarify I am not anti-profit.)
Fix, repair, improve, do not destroy.