I genuinely think it doesn’t matter. Spam will get on chain no matter what. It has no effect on your ability (or anyone’s ability) to use Bitcoin as money. But it does have an effect on miner profitability / centralization.
As an anarchist I believe that nobody has a right to tell anyone else how to use a protocol. That is the conclusion I’ve come to.
I’m personally also not in favor of blowing up OP_RETURN and will never use Bitcoin as anything other than money. In my opinion this use case will price out everything else in due time, but central planning / censorship on the way infringes on Network incentives.