Just as there are people challenging sweatshop conditions there are people challenging sexual exploitation of women and children. This is just a derail in an attempt to shut down discussion.
I'm not automatically opposed to the sex industry, as I don't see an inherent wrong in sex, but I do see a general all purpose worrying attitude towards sex.
This is manifest when we get to prostitution when we get to the treatment of women. Men who use prostitues in the main are excused (outside of feminist circles), which when compared to the hit to a woman's reputation reveals a major bias towards controlling female sexuality.
Women who fall into that category are also at a significantly increased risk of violence from men. This simply cannot be allowed to stand. An attack on one woman simply because of the fact she is a woman is an attack on all women.
I'm not so sure criminalization will fix the problem on its own. It likely requires a complete overhaul and a root look at how we approach, but I do think sex workers are like canaries and reveal some pretty untenable and toxic attitudes.
Whatever we do the one thing I fucking don't want is German style super brothels opening up down the street from me. So sign me up to whomever doesn't want that.