An easier way to "wash coins" is by exchanging bitcoin to an altcoin then back again. Especially a useless one such as Doge that won't be around long.
The tactic of screening (aka colored) to be more of a inconvenience than anything. The person wanting to trade with you will have to check their own coins and send the one's that don't fit your description - in which they will send to someone else thus not taking it out of circulation in the slightest.
It's like vaccinations. Either a whole society chooses to do it, or it don't really work.
I'm not supportive of the colored coin idea at all. It would be on the level of idiotic Government jurisdiction idea's (such as the war on drugs) that manages to cause a whole slew of problems without even slightly acknowledging the original issue in which it was created to fight.
You just don't get it. Before you type anything on your keyboard again. Take a basic math course.
This is the type of responses I'm used to hearing when arguing with "Fiscal Conservative Christians" in Texas who, failing to provide an intelligent response to my position, tells me to "Go learn History/Economics/Whatever first" in which I almost am certainly better studied in the subject than they are, hence why I was able to present a position that had substance while they were limited to an emotional outburst.
Honestly, if the feds dump the coins back into the market, that is a good thing. Proof positive that the US government is treating Bitcoins as an asset with an actual value, as opposed to imaginary internet games.
I agree, it will also be a good thing when the original miners (such as Satoshi himself) finally use at least some of their coins, which will have the result of better distrubting the wealth to the masses allowing it to function much more like a currency than a commodity. But here is the difference;
Satoshi and the original miners have an invested interest (even if it where only based on greed) to do so in a constructive fashion, such as starting an ETF like TradeFortress had done.
While the Fed's (and their Masters) have every reason to bring down bitcoin, while their own financial gain by holding these coins are trivial. That is an important distinction to make. Even if the market isn't destroyed it could set us back by years.