Alcohol makes some depressed people more depressed, and they kill themselves. Is it disgusting that liquor companies know this yet keep manufacturing the product?
And this is why we don’t let minors drink. Adults get to do lots of potentially dangerous things, as adults we as a society (generally speaking, the specific details are different from country to country but the general principle seems universal) let adults decide such things for themselves.
Yes, it is, but we as a society attempt to limit its impact on children. The fact that there are alcohol and cigarette companies that do shitty things should not give facebook a free pass to do shitty things as well.