It appears to be under control at the moment If it continues then it is possible to request that the article be protected for a while from certain types of contribution That is done at WP RFPP and I m sure someone will do so if it seems necessary Of course even anons are entitled to have their say but the article talk page is the place to do that when it involves removal of reliably sourced content One thing that something like semi protection can do is force the anons to discuss rather than edit war although in my experience they tend not to bother and either go away or just wait things out until they can disrupt things yet again