Knowing the ramifications of actions.
Parents being horrified and taking the time to talk to their kids about it.
There's a final tipping point for people that commit suicide, but it's not usually over one isolated incident. To blame Ravi and Molly completely, and to have them take the complete consequences for Tyler's actions is just as immoral as their actions.
They aren't charged with his suicide. So the law doesn't blame them for the suicide at all, let alone completely. What they are charged with is invasion of privacy, and that is completely unrelated to Tyler's reaction.
Why should they if they convicted serve no time for this whatsoever?