  What do you think the positive reinforcement parenting version of "I'm going to send you to bed without eating if you play with your spoon again" would be? This is the kind of question I ponder a lot. When you review parenting methods [semi] professionally, you're left pairing your own method against everything you review. What would I call the method if my own parenting were to become one? The say it and mean it method. Or consistency like OCD in parenting method? I'm love centered, incorporate a lot of attachment parenting, but I am a hard-ass.
Positive reinforcement parenting is very good for the kid's brain. Studies have pretty much shown overwhelmingly that a young child's verbal capacity (read the best determinant for later intelligence scientists have found) is directly and inversely correlated to the number of times the kid hears "no" or similarly negative feedback. In other words, kids who don't hear no all the time have fantastic vocabularies. However... By telling my kids no all the time, I can take them to any restaurant in town, I can take them on 9-hour flights to Europe with 0 problems, basically, I can rely on them to be good in any situation from church to in-laws. Exposing your children to different experiences is also one of those amazing corollaries to intelligence. And I wouldn't be able to expose them to much if I was afraid they would embarrass me everywhere we went.
Like Johnny Cash, I try to walk the line. I say no as little as possible. But the best way to say no as little as possible is to mean it when I say it. I enforce on the first go, and I enforce in the nice voice , so I don't have to use the mean voice to mean it in a public setting. I don't rely on distraction as a correction device because I think that encourages bad behavior by inadvertently rewarding it with more attention. I try really hard to incorporate the one part of positive reinforcement parenting that I like: giving your kids a ton of reinforcement (attention) when he or she is good. 
