Don't forget about the subversive boobs that like to taunt aggro durring treks,
Suboxide
Another problem I see is when doing a trek for instance, what if one of the boobs has his light on and the others not if it's like now there is now way for knowing since we can't see each others lights.
In that case the trekkers will have no idea what the agro range is (I imagine more agro isn't possible in your idea just a larger agro range on the mobs for ppl that have the light on).
And if you want to make the light visible for others so they can know if somebody during a trek i using it that also implies that I will see other homins light up all the time and i don't want that either.
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Disclaimer: Any resemblance between the characters in this post/thread and any homins, living or dead, is a miracle.* The characters in this post/thread are fictitious. Any homin resembling them is better off dead**
*You Nazty Spy
**I'll Never Heil Again