Hi, This is my first post. I have been creating WH (with a touch of gray) sites in the past; several of my sites have excellent rankings with Google, which of course I don't want to loose. I am considering starting some BH activities (multiple blogs, back links, pyramids, etc). My idea is NOT to mix my BH and WH sites; all stuff created with BH techniques would be directed to new BH sites I would create. Question: Should I be concerned with the possibility of Google detecting my BH work and punish my Wh work? Can I safely visit and work on my WH sites and, using the same machine (and same Google accounts), visit and work on my BH sites? Can you recommend any precautious measures? TIA.