is there an actual roadmap proposed in how to filter those transactions?
No, there are only some ideas, related to dropping historical data. Which means, that no matter if something is a real payment, or some kind of data push, it can be stripped in a similar way. And then, transaction makers are mostly unaffected, because usually they care only about the final destination of their coins, while data pushers will cry, when they will find out, that less and less nodes are willing to share their pushed data, when they start providing proofs, instead of sharing original data pushes.
If there's no concrete plan, then the other parts of your post that were not bolded, DOES NOT matter.
And some people are still arguing that everything is OK. 😄
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I believe no one is saying that it's "OK", but what can you actually do? They paid the fees and didn't break any rules.
The network is open and permissionless, by the way.
¯\_(ツ)_/¯
Filtering transactions by miners equals censorship and I doubt any miner would filter this out when they pay big fees for this junk to be included.
Congrats, now you know how everything in the network actually sticks together.