Spawners is essencially a form of free loot and, in terms of resources and SF energy, an renewable source of such. Allowing such on towns that are pretty much isent from geopolitical warfare would allow to one farm disregardless and build a industry that could easily tear the sensitive economic of Nations.

spawners are already hard to claim, you either have to play/vote to obtain in-game vote-points/currency or pay irl money just to get the ability to obtain one with nether spawners having 10% drop-rates. So in my opinion it would be good to have spawners inside peaceful towns, though what you said is true, they should somehow be nerfed by modifying spawn rates inside claims of peaceful towns

BIG NO

Purify, they are not hard. They used to be hard but at the moment you can easily purchase one with less than 4k. Besides, while the Overworld and Nether Natural Spawners have been apparently dwelling (although I believe we have barely scratched the ammount of such "naturally" generated blocks), the addition of 1% chance on a Random Spawner in the Vote Crate Party, a crate that you can at most win 8 time a day, is already allowing the spawner to gain it's number. So no. In my opinion, allowing Spawners in Peaceful Towns is a bad idea as it's a risk that one must take to collect the fruit.

Regardless of how they are obtained or how common they are, the fact that only Non-Peaceful towns can use spawners is at its core a gameplay incentive, not a balancing measure. Allowing Peaceful towns to use spawners is like removing a part of Non-Peaceful towns' identity in a sense.