Preventative Policing

So with yet another incident of homegrown terrorism claiming lives, the media is once again rallying the flag to stop the violence. So how do we do this? I mean they could be anyone! They are among us and we don't know who they are, right? So, what can we do?
Blah blah Guns?
Blah blah Mental Help?
Blah blah Rehashed Retoric?
Well, the thing is, it seems we kind of do know exactly who these people are. The FBI was watching this terrorist already, and they were in fact watching many many other terrorists before they ever acted. I mean it's not even subtle, these people are using social media to chat with ISIS. So, KNOWING these people are publicly treasonous and violently insane, is there nothing we can do?
Yes, I know, first amendment, innocent until proven guilty, so on. These are concepts we founded America on, though honestly, how hard do we enforce these values when they're not in our favor? Japanese Americans were rounded up for "national security" and the government is blowing up foreigners with flying terminators. Is it too much to ask that the government at least does something if you're retweeting all of Jihad24/7's latest insights, or friending half the no-fly list?
I mean at the very freaking least, ban ISIS members from making accounts on these sites.
Blah blah Guns?
Blah blah Mental Help?
Blah blah Rehashed Retoric?
Well, the thing is, it seems we kind of do know exactly who these people are. The FBI was watching this terrorist already, and they were in fact watching many many other terrorists before they ever acted. I mean it's not even subtle, these people are using social media to chat with ISIS. So, KNOWING these people are publicly treasonous and violently insane, is there nothing we can do?
Yes, I know, first amendment, innocent until proven guilty, so on. These are concepts we founded America on, though honestly, how hard do we enforce these values when they're not in our favor? Japanese Americans were rounded up for "national security" and the government is blowing up foreigners with flying terminators. Is it too much to ask that the government at least does something if you're retweeting all of Jihad24/7's latest insights, or friending half the no-fly list?
I mean at the very freaking least, ban ISIS members from making accounts on these sites.