анонимный вопрос

As I understand it, you are only secondarily concerned with how a proper ancap should appropriately react to such a thing during an ancap (the correct answer: it’s not mandatory, provided you see an opportunity to hold the attacker accountable while maintaining greater dignity). More likely, you want to understand what a specific Svetov could have opposed against a specific attack in a specific Putinist Kazan.

And here, of course, it is important to have accompaniment. Since such symbolic actions, logically, may be recorded on video by the attackers’ accomplices, it is primarily important not to give them the opportunity to obtain footage that portrays the victim in an even more unflattering light, or worse, provides grounds for criminal charges. Therefore, the object of the attack must not chase anyone or attack anyone.

Meanwhile, a private individual who happens to be a witness to the attack by pure chance could well catch up to the attacker, detain them, and take a close-up photo; after that, it would be possible to sue them, as a photo is usually sufficient nowadays to establish identity through open sources. Of course, in Russia, and especially in sultanates like the one in Kazan, the investigation could easily fail to find the suspect, even if their full name, address, and phone number are handed to them on a silver platter, and the case would remain open against unidentified persons. After all, there has been no news regarding the investigation of the attack on Svetov in another sultanate—Kemerovo. But if people with authority were working there, then here the attackers are quite vulnerable. And (finally answering the direct question) after it turns out that it is impossible to legally hold them accountable, you can—and it is even highly desirable to—beat their faces. But this should not be done by Svetov, but by some unidentified persons who are in no way connected to the incident and simply learned about it from open sources. Well, what can you do; some people don’t like political activists, and some don’t like thugs.