You have two or more than two sites, will you use the same Google Account of Analytics, sitemaster, AdSense? Give you reason? Now, I still use the same account, but I afraid, if one of my site killed, the others will be affected.
Sure you can use the same account - in fact, google expects to use the same account for adsense at least. If you want different adsense accounts, set up a business and hire yourself. That's the way Shoemoney does it. If you are going to play risky - I would advise finding a way to separate the clean sites from the one's you experiment with. Setting up a business and giving that business a separate adsense account (and sitemaps etc.) would work.
I understand your concerns but unless you have a really high amount of sites and they are all of a spammy nature I wouldn't think that you have to much to worry about giving that information to Google.
Don't you think it is too risk. If one of your site has any problem, I afraid it will be infect your other sites.
If you don't give them a reason to close your account (which mean, all your sites lost their ads from adsense), you don't have to afraid.
Well, I use the same account for my google analytics, adsense and google webmasters I don't encounter ant problem.
I think you have to use the same account, you are not allowed to make multiple account with Google. Pretty sure!
We can't use the same AdSense Account in one name, but We can have different account in Analytics, WebsiteMaster.