The default value of OP_RETURN on Knots is 42 Bytes intended for hashes.
Knots gives node runners the FREEDOM to change the value to whatever they want in their mempool.
What does core do?
CENSOR contributers, people and opinions.
SPAM the Bitcoin monetary network with jpegs and shit by removing limit on OP_RETURN.
GASLIGHT that it does not know the meaning of spam.
COPE - your post is an example of that.