Can I get an answer once and for all? +Question about social media and how it is monitored?

[Randy]

You have an interesting question. Reading "mature" content is not illegal. Knowingly providing pornography to someone under 18 is. So the minor watching porn is the "victim," not the suspect.

As for agencies watching social media, the short answer is "kinda." Law enforcement does use social media to catch child predators, etc., and larger agencies do interact with social media for this purpose. However, posting "I'm getting high" is not going to get anyone's attention; in the grander scheme of things, the cops have bigger fish to fry.

The best thing for you to do, is to be a friend. You recognize that this person needs help, so be there to help. Keep in mind, if they don't want it/think they don't need it, you may not get far. I also hope you are getting help for your anxiety issues.