I was Mark Zuckerberg's mentor. Today I would tell him: your users are in peril

Facebook is a big part of my portfolio, and I fear the dangers of tech addiction. While investors' recent open letter to Apple is significant, more need to speak up

I am a tech investor, and Facebook is by far my largest investment. Still, for the past 15 months I have been pushing Facebook to sacrifice near term profits. The reason? I want them to address the harm the platform has caused through addiction and exploitation by bad actors. Government watchdogs barely regulate the technology sector in the United States, so investors like myself have a big role to play.

I was once Mark Zuckerberg's mentor, but I have not been able to speak to him about this. Unfortunately, all the internet platforms are deflecting criticism and leaving their users in peril. Zuckerberg's announcement on Wednesday that he would be changing the Facebook News Feed to make it promote "meaningful interactions" does little to address the concerns I have with the platform.