I can't quite fathom, the attack,surely must be about something more than "ticket scalping", but... the black market and the Bolshoi have been mentioned in the same breath before...
A few months ago at the Bolshoi:
"The only way to find a seat is to find a ticket through a specialist agency or black market touts which could cost up to 25,000 rubles ($800), according to the Russian media.". [re-opening gala]
"Despite assurances from the theater administration that seats to the first night show were available by invitation only, some online brokers still offered tickets to Friday’s performance, with prices ranging from 1 million rubles ($33,600) to 2.5 million rubles ($84,100)"
"Right after the Bolshoi Theater's main stage reopened following an expensive restoration, ticket scalpers began storming its gates. A popular LiveJournal post by an anonymous user calling herself angryrussia detailed how it was nearly impossible for an ordinary person to score tickets to, say, the “Ruslan and Lyudmila” opera – buying online was not an option, and lines to the box office were dominated by well-organized groups of “enterprising businessmen” who made profits off illegally reselling Bolshoi tickets.
According to the blogger, the scalpers were able to cut off access to the box office for hours – and the theater administration apparently did nothing to stop them.
Angryrussia asked the obvious question: “Why are these guys in hoods creating a ticket mafia 100 meters away from the State Duma – and nobody is doing anything about it?” She answers her own question when she muses: “Why do foreign theaters do everything so that I, a foreigner, can easily and comfortably visit them – and something like this is impossible in my own country? Or would something like this be seen as unprofitable by the theater administration – because the ticket mafia gives them a cut of its earnings? Oops, did I just say this out loud?”"
Could this also be why the director of the Gogol Theater was beaten up?