Welcome to FT!

Your question has been discussed and there are some threads on this topic. You just have to search at the right forum.

If you had tried and searched at Mileage Run forum, using your own words "skip" "segment", you will at least find the following:

http://www.flyertalk.com/forum/showthread.php?t=450864
http://www.flyertalk.com/forum/showthread.php?t=447876

Keep practicing your "search skills" here. You will be surprised how many answers are already there before you even think of your questions.