I don't think the Internet is necessarily a dangerous place. It's only dangerous if you don't make people earn your trust. You can't take people at their word. You got to do a little digging and make sure to verify that you are talking to a real person or the person that you think you're talking to.
We've seen the worst that human beings are capable of. We've seen what happens when leaders abandon common decency in favor of rage and hate. Through the lens of history, the Holocaust happened yesterday, the civil rights movement was this morning, so we are not as out of the woods as we might have thought.