There is no such thing as spamming the blockchain! Everyone is free to do what they want with the blockchain based on their available RCs. They “paid” for that by stacking their HIVE.

There could be many reasons to prefer to store data on a fully decentralized layer 1 rather than on a (centralized) layer 2 built on top of it.

If this is a problem, then the system needs to be reviewed.

PS: Don't get me wrong, I'm not talking about spamming on the social layer (comment/posts).