I always Tell IF YOU USE THE SAME COMPUTER it doesn't matter if you change ip or connect from another location or whatever you do. I know this because I used to create ADWORDS account with coupons and they were working well. But 1 day they decided to ban them. And there you go all accounts created with diffrent ips banned in the blink of an eye. The one account i created with diff. comp and diff. ip was not banned???? They track down your comp. not only ip. And if you use WMT and analytics or gmail i can't even think of how deep they know about your personal life. I don't think they have any limits and also i am pretty sure they even know our names,address,websites,friends,phones and do you think governments care about this ???????????????? Are you kidding me they buy this info from Google. I am sure they give google a hand to collect all the data they can.
Here is what needs to be done in my opinion:
1. Have a separated PC (home server) than the one you use yourself (for personal things etc..)
2. Setup a VPN on the "home server", so it will have a unique IP (different from yours), and no fingerprint from you whatsoever (obviously, don't open your gmail or anything here)
3. Setup virtual machines (VMware) using different OS for your fake identities and use different private proxies on each one of them. 1 VM (virtual machine) for a set of sites (2-3 usually, what can be natural)
4. Open your sites from only inside your appropriate virtual machine, using current private proxy (simulate that the sites are maintained from a fix computer, fix ip etc..)
5. Don't use chrome, don't search your sites from your private pc in google direclty (by their name or anything what is specific), basically you don't want to tell google that you know about those sites
Now, you have two layers of security. You need two, because should the private proxies fail for some reason, your real IP might be revealed, but using an additional layer, your VPN will save you. You won't give any fingerprint this way, because each VM will only work on it's own sites. There will be no correlation between your sites and you, if you apply this correctly. You can control your home server from your normal pc using remote desktop.