You can certainly do that, it’s not usually a problem in terms of interference. However, depending on your kids, unless you have one hub per kid you’re likely to run into the same problem. Classic case is the eight-year-old turning off the lights in the 10-year-old ‘s room. 
Plus, If you use any of the popular voice assistants, including Amazon echo and Google assistant, you’re going to run into huge problems. A single echo or Google account can only interact with a single smartthings hub at the present time. The same is true for IFTTT and some other third-party integrations.
The multiple hub approach usually makes sense if you have, for example, a separate home office or an Airbnb suite and you really do want to have the two completely independent of each other. But is soon as you want to share anything between them, including voice assistant integration, it’s way more of a headache than just using a dashboard app. 