A method for preventing the provision of notifications based on stored user data associated with a first user to a client computing device, in response to identifying a non-canonical session via demographic correlations, comprising: receiving, by a content server from a client computing device, a request for an item of content, the request comprising an identifier associated with the first user; retrieving, by an override service of the content server from a content metadata database, a first demographic profile associated with the requested item of content; the first demographic profile including, for each of a plurality of demographic traits, a first value for said trait and a corresponding percentage for said trait; retrieving, by the override service from a user profile database, a second demographic profile associated with the identifier associated with the first user; the second demographic profile including, for each of the plurality of demographic traits, a second value for said trait; calculating, by a correlator of the override service, a comparison score between the first demographic profile and second demographic profile by adjusting each of the plurality of percentages of the first demographic profile, based on an overlap between the corresponding demographic traits of the first demographic profile and second demographic profile, and calculating the comparison score as an average of the adjusted plurality of percentages; determining, by the override service, that the score is below a predetermined threshold; identifying, by the override service, the request as associated with a second user different from the first user, based on the score being below the predetermined threshold; transmitting, by the content provider, the requested item of content; and disabling a content personalization system for the client computing device, responsive to the identification, wherein disabling the content personalization system prevents the provision of notifications to the client computing device, wherein the notifications are based on stored user data associated with the first user. receiving, by a content server from a client computing device, a request for an item of content, the request comprising an identifier associated with the first user; retrieving, by an override service of the content server from a content metadata database, a first demographic profile associated with the requested item of content; the first demographic profile including, for each of a plurality of demographic traits, a first value for said trait and a corresponding percentage for said trait; retrieving, by the override service from a user profile database, a second demographic profile associated with the identifier associated with the first user; the second demographic profile including, for each of the plurality of demographic traits, a second value for said trait; calculating, by a correlator of the override service, a comparison score between the first demographic profile and second demographic profile by adjusting each of the plurality of percentages of the first demographic profile, based on an overlap between the corresponding demographic traits of the first demographic profile and second demographic profile, and calculating the comparison score as an average of the adjusted plurality of percentages; determining, by the override service, that the score is below a predetermined threshold; identifying, by the override service, the request as associated with a second user different from the first user, based on the score being below the predetermined threshold; transmitting, by the content provider, the requested item of content; and disabling a content personalization system for the client computing device, responsive to the identification, wherein disabling the content personalization system prevents the provision of notifications to the client computing device, wherein the notifications are based on stored user data associated with the first user.