@DrewDad,
It's ok if you call me arrogant and narcissistic. We can move past that, then.
I still believe we have all said things that we wouldn't want a mentally unstable person to act on - and that when we do, we aren't guilty of the result of their actions. I think to censor ourselves due to concern about what might be acted on by an unstable person would be a ridiculous way to go through life.
How do we know how a mentally unstable person may interpret our comments?
And, have you noticed how much easier it is to give good advice, rather than police what you know is the best behavior in your own life?.. Many times, we're much better advisors because we aren't emotionally invested in other's lives, so we can more easily see their mistakes. We're creatures of habit - and some things we say and do are so intrinsically motivated and habituated, that we don't even realize we're doing/saying them.
We like to think we're better than this. So, we do.