How should teenagers protect ancient civilizations?

A few years ago, the topic of tourists doodling on buildings once again became the focus of public opinion. Because, unlike in the past, this time, tourists actually carved words on a copper cylinder with a history of more than 300 years in the Palace Museum.

In fact, tourists have been doodling in various scenic spots and tourist attractions for a long time. Friends who travel frequently may notice, but in places visited by tourists, there will always be messages such as "Zhang San visited here", "Li Si remembered this year" and "So-and-so witnessed love here", and all kinds of graffiti exist in many tourist attractions, including some well-known scenic spots. This phenomenon is not uncommon in some tourist attractions in our capital. What's even more frightening is that when walking on the streets of the capital, not to mention some walls and underground passages, graffiti can be seen everywhere, and even many public toilets are full of graffiti. This crooked handwriting and graffiti without any artistic elements are just like "ghost symbols", which can be said to be unsightly. It is no exaggeration to say that graffiti, like small advertisements on the street, has become the "psoriasis" of tourist attractions.