It would be helpful for node runners without hash-power to know what, if anything, they can do, to participate in this action.

My understanding is that switching to Knots or running the Ordisrespector patch will slow the propagation of 'Ordinals', at the P2P layer, but won't stop them eventually finding their way in to blocks.

Is this still a meaningful way to register ones opposition to Ordinals?

If the exploitation of witness data is patched, at a broad level, would those dumping jpegs into blocks pivot in some way, and would this be a more or less favourable situation vs where we currently stand?