DBA most likely means “don’t believe anything” or “don’t believe anybody”
Just checking Yandex - it did give a better result for "flat earth" as a search with lots of great YouTube videos near the top. Wikipedia came in at the 10th result in the list so that was good too.
I'm sure Yandex welcomes malcontented revolutionary thinkers. To quote Yandex:
Your huddled masses yearning to breathe free, The wretched refuse of your teeming shore. Send these, the homeless, tempest-tost to me
I just tested "flat earth" as a search on both Google and YouTube, and the results are quite distinctively different.