With regards to what I said here:

> This then encourages them to be on the safe side and use these filters. Bitcoin Core might then have to adopt similar rules in order to produce blocks that are safe.

This would be a "nice" use case for what Greg Maxwell suggested today on the mailing list (and earlier on Reddit), to separate relay policy from mining policy - where the latter can be more strict:

> That said, Bitcoin core has generally not

had knobs to adjust relay policy as distinct from mining policy in large

part because of the design assumption that the two need to be the same.

But in this case if there were a knob here I think would make more sense

for it to control mining policy rather than relay policy, since it would

actually have some effect in the mining context (in excluding the txn from

your own blocks) while as a relay only thing it is impotent.