[HighStakesPro]

If they see that you call them down with legitimate hands on the river, then if you fold on the river in the future they will probably put you on a missed draw or a hand that just got counterfeited. The bottom line is some people will bet on the river no matter what card comes up if they bet and were called on the turn, and some people will even bet out of position on the river when you've been taking the lead throughout the hand, if a scare card comes on the river, and they will do it no matter what their hand is, so you have to call down on the river. The main problem with raising the turn is that most of the hands that beat you (flush, straight, possibly even trips with a straight or flush draw) will three-bet and you'll lose extra money if you call, and even somebody who's on a draw will three-bet sometimes. Generally you don't want to raise unless you are confident with capping if you get three-bet. If you're going to fold to a three-bet on the turn, you might as well just call down instead, it costs the same amount of money and you have a decent chance of having the best hand at showdown.