Privacy Concerns
Presence is highly sensitive information and in non-trivial systems a presentity may define limits to which its presence information may be revealed to different watchers. For example, a worker may only want colleagues to see detailed presence information during office hours. Basic versions of this idea are already common in instant messaging clients as a "Blocking" facility, where users can appear as unavailable to selected watchers.
Read more about this topic: Presence Information
Famous quotes containing the words privacy and/or concerns:
“You may well ask how I expect to assert my privacy by resorting to the outrageous publicity of being one’s actual self on paper. There’s a possibility of it working if one chooses the terms, to wit: outshouting image-gimmick America through a quietly desperate search for self.”
—Kate Millett (b. 1934)
“Our ideal ... must be a language as clear as glass—the person looking out of the window knows there is glass there, but he is not concerned with it; what concerns him is what comes through from the other side.”
—Elizabeth Bowen (1899–1973)