...
You might not have a choice.
What are you going to do if I'm a criminal and decide to "taint" your Bitcoin by sending bits to your wallet? Sell your bitcoins?
It would actually make economic sense for a criminal holding a large amount of tainted Bitcoins to do just that with a portion of the tainted Bitcoins.
"now everyone is a criminal!" lol
Well my perspective is that the idea will be to "follow the money"...Just because A THIEF sent $0.0000001 worth of BTC to your address probably doesn't mean much..
But if I sent 10 BTC or 50BTC or 10000 BTC then it gets more interesting.
That threshold of relevance will be determined by our overlords lol