Yes, a determined adversary could certainly mimic DarkStar_'s job for several months and start to figure out who is who
Several months? One to two weeks is enough to figure out what's DarkStar's payout address. Just like someone could follow you for two weeks to learn your daily routine and when the best time would be to break in to your house, but there is a big difference between that and sticking a note on your door saying "I'm going to be at work for the next 12 hours".
As if you had a giant ChipMixer sign below your public posts which would indicate how much you make, and for whom you work with. 