Why do people who buy BMW 5 Series always remove the words from their ass?

There are generally two kinds of people who deduct the tail mark. First, I bought a low-displacement car and removed the tail tag for vanity to deceive people who don't understand cars. Another person, such as ZhengF, bought a large-displacement and high-profile model, and didn't want people to know that they wanted to keep a low profile, so they deducted the tail tag.