1. A method, comprising: collecting presence information from a first utility and a second utility associated with a user, wherein the presence information comprises time-based data; comparing the first utility presence information with the second utility presence information; determining, as a result of the comparison, to treat the first utility presence information and the second utility presence information as different or analogous events, wherein the analogous events provide redundant presence information; and selecting, via a processor, at least one instance of the redundant presence information to drop from a subsequent presence aggregation calculation for the user.