From the update:
Every 10 blocks, user clients network-wide will send any unmixed, traceable Darkcoins in their possession through an anonymization phase. In this phase, Masternodes are used in chained succession to mix the coins they receive from the network and break them down into homogenous denominations. After being processed by a minimum of 2 Masternodes, the coins are either sent to the next Masternode in the chain or back to the users wallet at randomly generated change addresses.
Can a user opt-out of this background anonymization for some or all of his or her coins, or is Darkcoin moving to a model where it is essentially mandatory that all coins be mixed in this way even if they are just sitting in wallets?
I ask because it seems like there are use cases where being able to trace the history of your own coins -- or proving that history to others, by pointing them to a neutral third party block explorer -- is a desired feature. Scrambling the ability to trace and document that history (when the ability to document that history is actually desired, of course) by mixing coins in the background introduces some new wrinkles, especially for business use cases.