Ethereum developers have locked in Oct. 6 as the test date for their highly anticipated "Glamsterdam" upgrade. However, the announcement comes with a serious warning that bad actors using "fake" identities could stall the dress rehearsal of the upgrade. Developers warned that anyone, even a teenager with free test ether, and a handful of fake accounts could repeatedly win the Ethereum network's auctions to process the next block of transactions. Then, the bad actor could simply ghost the network by withholding the data, effectively freezing the blockchain's traffic.