[tylerl]

That's not really the question. You kinda missed the whole point.

These companies exists because they serve a need. There's proven demand; killing Facebook will create a Facebook-shaped hole, which will immediately be filled by the most capable alternative.

In today's climate this almost certainly means that any American tech firm you destroy or break up will be replaced by the Chinese state-controlled equivalent, because at the moment they're the most capable existing competitor in most cases.

There are a few alternate potential outcomes, but all of the likely ones are just as bad or worse. The "break up tech giants" concept is very much like the "war on drugs" from years ago; it sounds like you're doing something good, but the end result can only be unmitigated disaster.