The financial markets has not functioned in the way you think it functions for a long time.
Institutional investors (banks, mutual funds, hedge funds, etc.) control 80% of the market, while retail investors (people like you and me) controls 20%. You guys wanna take a guess as to who the institutional investors favor, by a long shot? Also, to get deeper into this, a lot of institutional investors are passive investors (ETFs), which means they just passively buy stocks, regardless of expected performance.
The takeaway from this is that if you think retail investors (you and me) can still have an impact on stock prices, you are being too idealistic.
Not to say that their stock prices won't drop a bit on Monday, but if you are expecting actual significant impact (drops of -10% or worse) on these companies, I wouldn't hold my breathe.
Edit: I do agree that longer term, we may be able to make a difference. But in the short-term, I wouldn't expect anything drastic so don't be disappointed. Hold steadfast and we may be able to see results in 1-2 years!
It won't fall because of the ideological opposition to censorship, it will fall because it will be far less profitable without an irreverent president of the united states. The hedge funds will move the investments from Twitter to Facebook until it recovers.
Definitely a possibility, though I don't know enough about valuations for these tech companies. I was under the impression that they weren't profitable anyhow? When I checked 3 years ago, their PE ratio was like 350x.