To give a specific example, if you friend someone on Facebook from Diaspora then Facebook would probably have cached copies of any data you publish that is accessible by that friend, including all your public data. (I guess you would have to agree to Facebook's TOS when you friend that person, even though you don't have a Facebook account.)
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To give a specific example, if you friend someone on Facebook from Diaspora then Facebook would probably have cached copies of any data you publish that is accessible by that friend, including all your public data. (I guess you would have to agree to Facebook's TOS when you friend that person, even though you don't have a Facebook account.)