I've had recruiters submit me for positions I haven't approved (CrossCreek). Oh, yeah, repeatedly. And after I'd talked to them about it. Repeatedly.

I've had them email me en mass for an opportunity (varite.com).

Indian boiler-room VOIP indecipherable accents too numerous to mention (too numerous to mention).

Grossly mis-fit pitches (wrong state, country, skillset).

Recruiters who repeatedly call and leave messages (I expressly state my contact preferences, and have a pretty clear statement on my voicemail regarding same).

Others in my spam list:

aditi.com alphasolutionsinc.com andiamo-group.com artechinfo.co aurionpro.com greythorn-mail.com idexcel.com infobiagrouppanels.com infobiagroups.com kidawa.com mindlance.com myinfobiapanels.com omnikron.com panzersolutions.com streetdirectory.me tscti.com

And I've worked with a handful of folks who are sincere, genuine, and turn up good leads. Best bet is of course personal contacts.