The Post got a hold of a letter that Community Board 2 sent to Manhattan DA Cy Vance, urging him to be tougher on prostitutes: "With sex workers on every corner -- which they are on every weekend night in the far West Village -- residents don't feel safe and are frequently disturbed." A police source explained, "They are getting arrested, and there is no long-term penalty." Last year, there were 183 prostitution-related arrests in the 6th Precinct, while there have been 59 this year so far—but cops caution, "as the weather heats up, so will the curbside sex trade." This is not a new complaint and two months ago, R&B singer D'Angelo was busted.