If you don't agree with the individual's approach, then direct your concern to members of the foundation. They are ultimately responsible for marketing and the person in question is at least trying which is more than can be said by most people who own DRK who post on here.
I am not a Twitter marketing police for Darkcoin, I tried to help as much as I could on Darkcoin Talk. The Foundation members were included in the discussion on the Twitter and it is up to them to decide how to proceed with PR efforts. I also provided them with quite a few ideas for it so...
Also, I would not feel comfortable "denouncing" someone who tries and is working all the time, despite my opinion he's doing it wrong. I could be wrong in my evaluation of his efforts as well, right?
Here, at the other hand, we're engaged in a discussion. I see people attacking that _sciencerocket guy and his decision to sell his Darkcoin holdings "based on spam". While I put the lottery guy on ignore, not to be bothered with his spam messages, this tweeting issue is also interesting to ponder. It is the overall feeling a bunch of tiny details give to someone, anyone...
You made some extremely poignant comments over on dct regarding the twitter approach. I'm disappointed that none of your advice seems to have been taken, and have resorted to filtering my #darkcoin twitter search results. He gets an A+ for effort, but all that creative energy and effort could be spent generating much more light than heat.