Earlier quoted context omitted.
It depends on how good the enforcement is. If orbital space lasers were set up to incinerate anyone committing an act of violence within a few seconds, it's hard to see how incitement to violence would work. Comparable examples might be getting blocked for posting too fast and triggering the automated spam filter, or trying to harass someone by mailing them $100 bills. At the moment police response time is still 15 m…
Not sure if you realize the irony of such extreme violence as a tool to counter violence. Perhaps you don't consider it violence if it is within the law? If so, is it violence to execute people for homosexual acts? What about ideologues that seek to introduce the the death penalty for gay sex? Or is such legal actions only non-violence if it is used to enforce the values that you happen to hold yourself?
I was thinking of an objective definition of violence like causing death or serious injury. The death penalty is rarely used in most countries and seems unlikely to significantly contribute to overall violence statistics, compared to police shootings or natural disputes. The Hiroshima bomb is debatable as it might have caused more radiation deaths than an invasion from Japan would have. But a total surveillance system would not obviously cause any more deaths and could be used to prevent them.