[new1234567]

Please don't do this. There are a number of reasons why legitimate users would need to use new / separate accounts just for job listings.

For example, some companies don't encourage participation in public discussion boards such as HN, but posting jobs on HN is fine.

[dang]

This is the kind of subtlety we need people to tell us about. Thanks.

I don't think we'll impose a karma threshold. Browsing through this morning's thread, most of the posts are clearly legit. Punishing innocent posts (as would inevitably happen with a threshold) isn't justified unless the problem becomes critical, and it's not.