Prop settings

Is it possible to disable a prop (in this case, hats) by setting it to -1 (as I believe it shows in the locker menu when you disable it)? I've tried that, but still see hats spawn.

Perhaps it's tied to randomized props (if that takes effect after the setting of the prop by the entry; it really should be the opposite if possible)?

Also, how exactly does the function work? Is it on by default for non-freemode peds, unless specifically turned off? If turned off, will it not spawn any props by itself? If turned on, does it respect prop spawn settings from the ped file, or is it truly random?

@BejoIjo I'm also curious about the exact way Ultimate Backup sets props (if any different from LSPDFRs functions, and I do know that setting a prop to 0 will disable it, so that's not an issue unless it can be overridden by random props), and if the same suggestion could be done if needed.