Can't the hotel front desk write the room number in red?

Why can't you write someone else's name in red pen? It is not superstition, but taboo that the red pen can't write the name.

The death penalty in ancient yamen was painted in red, so it is disrespectful to write other people's names in red. When the ancient emperors killed people, they circled and crossed out their names directly with a red pen. There is also a superstitious saying. It is said that there is a life and death book with the names of all the people in the world. If a horrible person thinks it is time to end his life, he will draw a circle with a red pen, so writing someone else's name with a red pen is equivalent to cursing others, which will shorten his life or bring bad luck.