One of the things to collect are mask of a serial killer. You can grab or destroy them. Does it make any difference to the reward?
EDIT:
Now that I've found 3 mask, I have the impression it is just that some mask can't be destroyed (can't fire underwater for example) and so must be grabbed, and other must be destroyed because they are too far away to be grabbed, if anyone can confirm.
Best Answer
Yep, it's confirmed. Destroying the masks counts as much as collecting them. This could've saved me a ton of time. Those hard to find ones would've just met molotovs, grenades, rpgs and the like just to give me a reason to spend money on ammo to empty my wallet.. Hope this helps others.