Personally, I think every short drive-by good or bad review should be deleted. There is not enough info to be valuable to anyone and these kinds of posts are more likely to be shills or trolls. IMO, every person reading for reviews should avoid these kinds of posts.
Also, use the posters history to see what kind of posts they do. Anyone who only posts white knighty good posts or only negative whiney posts isn't someone to trust either even if their reviews have good depth. They both are too extreme to one side too give an unbiased reviews. A white knight kind of guy will give an average sessions a 9 or 10/10, while a set in stone whiner would give a 2 or 3/10.
This forum has to make money and they can do what they want. But one thing that almost never happens is those drive-by one liner shilly posts getting deleted. Drive-by troll posts get deleted fast, but those.... "OMG, she's the best ever. Go see her. 10/10" that are short and have no detail almost never get deleted.