Banning stripper job ads?

From the BBC, in Britain. You can click on the link for the whole story:

1. A ban on using jobcentres to advertise for strippers and lapdancers is expected to be announced this week.
2. The new ban is expected to apply only to so-called performance jobs, and not to adult industry shop or bar staff.
3. Figures show that jobcentres advertised more than 350 jobs in the sex industry in 2008.

I don't know anything about Britain, how the sex industry works there, or even really what jobcentres are. But it doesn't found so fair to me. Why can't strippers look for jobs like everyone else?