Yes, how are you going to make adequate excuses for the flatulence!!!
Cheers, Tony. 
They are renowned for that, but do have really unfortunate effects on the digestive system of some people. I had to stop growing them as OH was dreadful with them
They are very easy to grow and can become invasive. They also grow very tall, so site them where they won't shade other crops.
You can leave them in year on year, but you do tend to get a tangles mess of tubers if you do. If you dig them up each year, you can harvest what you want and then replant some for next year. You never get them all, so be sparing with the replanting.
Other than that, leave them to get on with it
