what is this means:tales filtering back to russia of internet marriages gone sour?

Answer 1

First, let's get the question right:

"What DOES this mean: Tales filtering back....sour?"
OR
"What is the meaning of this: "Tales filtering back...sour?"

What this means is - people from Russia who know, or are involved, in a marriage that was arranged over the Internet are telling others in Russia about their marriages gone wrong.

Answer 2

When people from Russia end up in bad marriages. Then they write letters to their relatives and friends about it. And sometimes they go back to Russia and tell many people there about it.