I agree with Trump, ISIS propaganda shouldn't be on the net, beheadings and so forth. Am I in the wrong forum?
There is a lot of crap on the net I don't approve of. However, burying what these people are, who they are is not likely to be the solution. The comms are up, listen in and track people who do (approve). Take that part of the cyberwar to them, and see who is watching, and check them out. If that is so widespread that it can't be monitored (and why would that be, considering everything is monitored?), potential jihadis can be flagged, networks can be sorted out and sigint used to interdict any terrorist operation.
We have already lost many liberties in the name of 'safety', and I won't get on a commercial airplane because of that crap.
Granted, the 'lone wolf' types are going to be a problem, but that should form a pattern, too, that can be analyzed for. With all the profiling people out there, there should be at least one profile model by now.
And stop importing people who are likely to become shaheed. Err in favor of safety.