TBH, good. Do you remember what happened the last time a kid posted this on social media? He went and shot two cops, tried to kill his girlfriend and then killed himself. It's nothing but a precaution.
Everyone acting like he should NOT have been arrested is a JOKE. There is NO defense for ever even insinuating that you are threatening ANY US citizen, let alone a member of law enforcement. This guy must have some serious issues if he explodes on Facebook about possibly shooting cops after his brother is locked up (more than likely for a good reason).
I myself feel safer knowing that the police take these threats as seriously as they should tbh
As for anyone else...
You know I was just reading an article how people who commit public shootings leave obvious messages in social media post etc. and that people never respond fast enough, so I don't blame them