Okay, I may be a bit less worried in this case. Basically you state that in the current mining landscape a centralization effect is negligible. I'd still argue there may be a long term effect that could change this (e.g. all larger pools offering Slipstream-style accelerators) and above all smaller pools could be at disadvantage, but that's speculation as we don't know what will happen in a few years.

At least they used the Taproot exploit and not the "fake address" method, so only one small output is in the UTXO set. And I guess it may be even spendable, as it's value is above the dust limit. I don't know the Ordinals format well enough however, I guess this output will only be spent when the owner of this Inscription changes.

In the case of OP_RETURN, such "accidental" outputs can also occur (as long as there is no Ordinals variant based on OP_RETURN  ), but as they're not related to ownership they should be spent fastly.

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.