Why doesn't tripadvisor prevent people from voting for their own review? Each machine, be it a pc, laptop, tablet, smartphone, etc. has an electronic source address. When a source is used to write a review, that source can be disabled from voting for their own review. It can even be done retroactively. Tripadvisor can even be made so that one source cannot vote for a given reviewer more than once in a given time period. It is absolutely ridiculous how many people are voting for their own reviews -easily viewable when someone writes a two line review, and it is the only one with a helpful vote for that restaurant for the past six months, with the same pattern for the other reviews of this person. The entire notion of helpful votes becomes corrupted.