1. A system for enhancing reliability of ratings provided to users in a social network, the system comprising: (a) a processor; (b) a memory coupled to the processor, the memory comprising: (1) a database comprising: (i) profile information corresponding to each user, the profile information comprising information corresponding to one or more types of ratings received by each user, the ratings being received based on at least one of sharing, exchanging, and selling one of activity, service or product; (2) instructions executable by the processor to enable a first user to provide rating to a second user based on at least one of sharing, exchanging, and selling one of activity, service or product; (3) instructions executable by the processor to enable the second user to raise an objection on the rating provided by the first user; (4) instructions executable by the processor to accept or reject the objection raised by the second user, the objection being accepted or rejected by analyzing the information corresponding to at least one of the one or more types of ratings corresponding to the first user and the second user; and (5) instructions executable by the processor to update the at least one of the one or more types of ratings corresponding to the first user and the second user, the at least one of the types of ratings being updated based on acceptance or rejection of the objection raised by the second user.