1. A computer-implemented method for classifying network resources, comprising: by a computerized system that comprises one or more computing devices: selecting a network resource to be classified, wherein the network resource is selected based at least partly on usage statistics reflective of actual usage of the network resource by users; in response to the selection of the network resource, outputting an identifier of the network resource for presentation to each of a plurality of users via a user interface that provides functionality for the users to vote on a classification of the network resource, said user interface enabling each user to select a classification from a plurality of predefined classifications; recording a plurality of votes cast by the plurality of users via the user interface, each of the plurality of the votes designating a classification selected by a respective user for the network resource; and assigning a classification to the network resource based at least partly on the recorded plurality of the votes of the plurality of users, wherein the classification of the network resource is assigned if a predetermined number of votes having the same classification is received, wherein the predetermined number of votes corresponds to at least a predefined percentage of the number of said plurality of votes.