In the style of so many Chinese and Indian restaurants in Greater Boston some Thai places offer lunchtime buffets. Has anyone any opinions concerning these? I saw one such buffet promoted by a place down on Charles St towards the Common from the Charles Station end (on the opposite side from the King and I.) I thought about going back --but haven't. Should I ? Has anyone found a good Thai buffet in these parts --or is there something inherently evil in such a concept ?