There was a lot of discussion in here recently about restaurants and hotels who were manipulating the rankings by encouraging clients to post positive reviews here in TA. There was also a mention (can't find it now) of TA's refusal to do anything about unwarranted and false reviews that were damaging businesses.
As you will be aware TA does nothing to confirm that reviews (good or bad) are genuine. It would now seem that they are going to be forced to act. A group of hotels and restaurants are employing a reputation management company to take up this issue on their behalf..