Coblee, with Satoshi out of the picture now for a while, is the ONLY developer who truly understands the necessity of not screwing around with his coin. Remember, the whole reason BTC/LTC work is because they are a digital approximation of physical gold and silver. The only way they work is to ensure they mimic physical gold/silver as close as possible. Back in the wild west, if a robber hijacked your caravan and stole your chest of coins, there was no central authority to invalidate the coins in the robber's hands and make the victim whole. The value was inherent in the coin itself, nothing else. If you start a precedent of voiding transactions you don't like (for whatever reason), you're removing the value from the coin and transferring the value to the central authority. And this is why you can't do it, because in doing so you pull away from the basic necessity of crypto being a digital version of physical gold/silver.