Is it illegal to paint rights protection slogans on the glass wall of someone else’s door?

Illegal. The phenomenon of graffiti on urban public buildings or public areas seriously affects the city appearance and violates the relevant provisions of the city's city appearance and environmental sanitation management regulations. The city appearance and environmental sanitation administrative department of the urban people's government or other In addition to ordering the entrusted unit to correct illegal acts and take remedial measures, the entrusted unit may also impose warnings and fines.