YOU are telling people to use mixing services such as coinjoin which are already considered by regulators as suspicious enough to delegate via active regulation that services to put funds on watchlists and investigate if it reaches thresholds
So, let me get this straight. You notice that regulators are hostile on mixing solutions such as coinjoin, yet you're somehow under the impression that they will not be hostile on mixing via mining pools. Makes sense! 
thus im saying use ways that are currently not in regulators remit and currently regulators have deemed mining as NOT A MSB
Your proposal is not currently in regulators' remit, because first of all it is one of the dumbest ideas I've ever heard, and second, because there is no implementation and usage due to the former. Be certain that if enough people started mixing through mining pools, regulators would deem it as suspicious and enact it as illicit, just as with coinjoins.