I have over a dozen reviews on tripadvisor.com-today I submitted one of the Alladin in Las Vegas and I got this in my email
By clicking the link above, you are confirming that you wrote this review and
that you were a guest at, or had a first-hand customer service experience with, the property you have reviewed. Please double-check that the review is
attached to the correct property, as many properties have similar names.

You are also confirming that your review is unbiased, that you are not and have
never been associated with the owners or management of this property and/or
their competitors/other properties in the area and that you have not received
any compensation (including a discount on a future stay) in exchange for your
review.
I guess thiss is a good thing?