Social media is again being used as a battleground by Russia as it continues to try to "sell" its invasion of Ukraine to the Russian people, and to sympathizers abroad. Facebook and Twitter are trying to take stands to thwart Russian disinformation and state-run media postings, but it's probably a losing battle — and there's always TikTok. Over the weekend, Facebook/Meta published an update on its efforts to block or stifle Russian propaganda campaigns within Ukraine, and to fact-check news reports being posted on the Facebook platform. "We’ve established a special operations center staffed by experts from across the company,…