I know it's a kids' show, and I'm overthinking it, but why the hell aren't more of the criminals scared of mystery Inc.? Not only is one member(depending on the version) 6'0-6'5, but also the dog is 5'4-5'9 that can also talk. That's Scooby on all fours btw, thats not him standing on his hind legs, which would make him 6'0-6'1. This is a great dane who talks and who can walk on his back legs like a person. DO YOU KNOW HOW TERRIFYING THAT WOULD BE????
Another one can set traps like he saw Home Alone and thought how would MacGyver improve them, another one has a balck belt in karate and gives Bruce Lee a run for his money, and the short one has been complimented by THE Batman(and worked at NASA) , also the real tall one can run faster then Usian Bolt.
What would you do at that point? The games over, no insurance money/real estate is worth that much effort.