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Hackers have emotion. People says the Bitcoin blockchain is hacker-proof. No hacker has ever managed to hack even a bit of the Bitcoin blockchain since its inception in 2009. The cryptographic process was designed to be very expensive to reverse. So expensive that the total world wealth is not enough to pay for the work to reverse the process. Thus, hackers express their frustration by plaguing the Bitcoin blockchain with grafittis. They creates fake transactions embedded with grafittis. It is so fake that even miners cannot differentiate. Fake transactions do not compromise on the integrity of the blockchain. However, each of them adds long term memory cost to the miners machines. Fake transactions soothe hackers frustration against so many failed attempts to hack the blockchain. Graffiti in Transaction What is a fake transaction? Before we answer that question let us understand what a real transaction is. A real transaction produces new coins to addresses. The new coins may com