I think the right way so people don't invent deviant things is to
increase the size of OP_RETURN, I don't get this number of 80B, you can
hardly store a signature (of what?) in there and not the "what" if the
"what" is a hash for example
Updating the size of OP_RETURN to support a hash (or two), a signature, and maybe a few more bytes for metadata, would be very helpful in a number of scenarios. It is still a limit but a reasonable one. Otherwise, I think we'll have a lot more inscription-style scenarios.