There needs to be some clear way for a candidate to categorize their own availability and interest, to lower company hiring spam, primarily from headhunter flunkies who don't know what not to do.

Examples:

- I'm employed, unlikely to switch, but interested to hear only of positions that match certain criteria exactly: (a, b, c, ...)

- Unemployed but interested only in positions that match my criteria

- Contracting only, and I'm interested in more concurrent contracts, and my current busy percent is x%.

- Unemployed and send me anything you think fits my skillset, and hurry!

Notice how different each of these are.