Carolyn,
We handle this via the 
Lead Status and 
Lead Status Detail field.  The 
Lead Status picklist contains choices for 
Never a Buyer and 
Advocate.  
Never a Buyer status would be for leads who should not receive any of our marketing communications and are subsequently flagged as Marketing Suspended.  The HR leads you mention would be slotted here in your scenario.  We automate this via a 
Reason for Request field on our Contact Us form.  
Advocates would still receive marketing communication but their score does not increment and they will never be put in front of a sales rep.  The 
Lead Status Detail further stratifies the selection.
Here are the Lead Status and associated Lead Status Detail choices we use:
- Never A Buyer
	
	
- Acvocate
	- Analyst
- Influencer
- Consultant
- Employee
 
Regards,
Rich