The problem is not to put extra data in block, but if one day this "extra data" have more value than normal money transaction. It would mean a priority given to extra data instead legit transactions. This is the point. If you want to put extra data, it's not fun but it's ok. If this raise fees or avoid legit transaction, it is clearly not ok. And the more space you give for extra data, the more use case will exist to use this place. #bitcoin must be protected for his future and not only "hope" fees will regulated it by their own. #btc4ever