I have never used Facebook and I never will. What they have done is immoral and unethical and deserves regulation.
What I fear is that regulation will be informed from the false and dangerous equivalence you've made there comparing addictive drugs to looking at an audio-visual screen. Drugs literally can make you want without there being any enjoyment. Screens are just a medium, like, a radio (which can also be used for random internal operant conditioning), the screens and the radio are not the problem and they are NOT LIKE DRUGS. You actually have to enjoy the experience and repeat it. And that's just normal learning. That drug comparison will lead to government's treating computers' like drugs which means heavy regulation of end users and violence against them. A far more dangerous scenario than the issues were facing from the corporations now.
We need regulation of the corporations intentionally doing random interval operant conditioning. Not regulation of the medium they do it over and the people enjoying using that medium.