I have never had the Radish plants get mature enough to go to seed but it sounds tempting to do. Radishes are the very first thing I learned how to grow when I was young. Radishes got me into this whole vegetable gardening thing.
I have tried cutting the Green Tops from Radishes prior to going to seed and using them in salads. The tops from the little Red Globe Radishes are excellent with other greens in a salad.