[ig1]

Won't this have the same problem as linkedin, programmers will delist themselves when they started getting daily calls from desperate recruiters ?

[100k]

Stack Overflow charges quite a bit of money for the right to search for candidates (plans range from $500 for one week access to $5000 for a year) so that should limit the number of inquiries.

Also, you can easily remove yourself from the search results.

[ig1]

In the financial sector recruiters can typically make around $50k for placing a single senior dev, paying an annual 5k fee is nothing

[DougBTX]

That probably happens with Stack Overflow anyway, but only people with the JobHunting bit set will come up in search results.