ACLU Goes After Prostitutes?

There's apparently a loophole in Rhode Island law that makes it "not illegal" for prostitutes to ply their, uh, craft indoors. They can't loiter on street corners and solicit, but they can sell their services blocks from the state house steps.

For me, the interesting part is not the loohole in R.I. statutes, but the seeming inclination of the state ACLU chapter to go after prostitution vis a vis this issue. To wit:

Steven Brown, executive director of the Rhode Island chapter of the American Civil Liberties Union, said he doesn't understand why Providence police believe prostitution is decriminalized when there are three felony statutes in Rhode Island that ban it. "The current laws on the books have real teeth in them and are available for use right now," Brown said.

I would have guessed that the ACLU would have been fairly loathe to wade into this area, since it's arguably an area of human behavior in which sexual/moral/legal "crusaderism" is strongly represented. Maybe I'm over-reading Brown's comment on the issue?