One has to wonder what the rate of replacement of destroyed cameras actually is. Very few victims probably do an exact replacement; either you don't replace it at all or you get an IK10 rated dome to withstand the beating. Its seems probable, though not polically correct, that the net overall effect on the cctv business would be positive (at least short term), since in addition to the replacements, pre-emptive vandal proof upgrades would be in demand.
On the other hand, the indiscriminate and sensless destruction of dummy cameras, who are actually silent compatriots of the 'Camoverites', continues unabated despite the recent awareness campaign which centered around its slogan "Think, Dummy!". ;)