If the media chose (or were forced) to ignore terrorism, would terrorism go away?
Yes
+1 Yes!
All acts of terrorism, at least in my humble opinion, are carried out to publicize their "cause". Always has been, always will.
Or, thinking further, would they just go for bigger more daring targets until it can't be ignored, to the point it would be irresponsible not to report it? Probably.
But ultimately Terrorism is pointless without media coverage. Look at the Daily Fail. Seizing on every ounce of misery in the world, all it does is amplify misery.
That itself is the issue... look at the fuss following 9/11. That single event has given rise to the 'Patriot Act', (an oxymoron if ever there was), two wars, and untold misery and suffering for millions of people.
Should any of the casualties from that one event or its aftermath be forgotten? Of course not. But if each event was ignored, what of the innocent victims and their families?
Tbh I am struggling to understand the response of people to attacks like 9/11 in a world where an assualt rifle costs less than a slap up meal and bullets cost 12p

if life is so valuable, how can it be ended so cheaply?
The 'terrorists' have won, inevitable really given that they'll stop at nothing to make a point.
The sooner the rest of the world admit that, the sooner we can all move on. If they know they have won, they have no further need to blow everything up, and by default we would have no further need to go tramping round the arse end of nowhere on futile revenge quests, just so that the media can report that we're doing something to defend our way of life.
Conceed the fight and then simply ignore the protagonists. Respectfully remember the victims, of course, but at a family level not an international one. Then move on.
Pretty straightforward really.