and maybe even if there are ways to show charts that separate spam and legit transactions
I can imagine that a flood of tx without fee can be considered spam. But nowadays, only mining pools use zero fee tx to payout their miners. There are hardly any zero fee tx issued otherwise. (800 in the past 24 hours, source:
https://bitcoinfees.21.co/ ) But if a tx carries a fee, how to decide if it's spam or not?
What is your definition of spam?
Don't you get it? Anything > 1 MB is spam.