If the OP feel like this is not proper technical or OT feel free to deleted my post.
FYI, this isn't self-moderator thread.
They could go one step further by excluding TX that create new P2MS output, since AFAIK there's no wallet software create P2MS output these days.
But then we would again arrive at the cat and mouse game gmaxwell mentioned. They would probably simply use other kinds of outputs for their next version, and that one would potentially not be distinguishable from regular payments anymore.
I know, i was just mentioning what they could do to achieve their goal. But after verifying on their website[1], some of their mining templete already disallow that by using
-permitbaremultisig=0. For better or worse, OCEAN mining pool only have 0.7% hashrate[2], so spammer either don't know or don't care about it.
[1]
https://www.ocean.xyz/docs/datafreepolicy#blog-bottom_post[2]
https://mempool.space/mining