I think it's our local Steak 'n Shake restaurant that uses selective color on the photographs adorning its walls to continue the black, white and red theme of the franchise. That in conjunction with older photographs gives the place a nostalgic feel to it, like the soda fountain shops in the 50's. It can work in certain instances. I think the glowing color of the batman sigil on his chest has good impact given the nature of the comic series. The second photo is cute but the selective color really doesn't have meaning there. A lot of people experiment with selective coloring when they first start processing. That is when you see people do a lot of things like heavy saturation or gimmick frames or heavy blurs trying to imitate the orton effect. Kinda like the thing you see when kids first start using graphics programs and suddenly the hair on their photo is bright pink and they stamped little stars over it and lines from songs. It's a learning process that when one has the technique down they generally use it less often, only when they can see the impact it will add to an image. Used tastefully like Batman above, it works. If everything was straight out of camera, film and digital, very few of the famous photographs that we saw then and see today would have the polish and publicity they do. So IMHO, it's okay to experiment and sometimes employ even controversial techniques that to some even seem corny. You'll find even more polarization with HDR lol.. and yet some really fine work can come out of it. Be the one to use it creatively.