The Mona Lisa has been behind bulletproof glass for a long time. Any rational person can see that the protestors did not intend any harm. They only intended to make a mild mess that will annoy the janitor for half an hour. The true intention was to trick people into posting this headline and bring attention to whatever they want to highlight. By posting this, we have just fallen hook, line, and sinker into their trick.
Agree with this. In the Louvre, there are many pieces of art not protected from potential damage that people who didn’t care could have protested at. Given that it was the Mona Lisa, I’m sure the thought that the protest would make a statement but not cause damage was considered.