Are you an idiot to keep paying your mortgage?

What a deal this is going to be.... stop paying your mortgage and get one or all of these..

1 - Reducing the interest rate (always good, but strangely this is only for 5 years?)
2 - Extending the term of the loan (which isn't really a good idea - unless you're really in trouble)
3 - Reducing the principal (to be paid back only when you sell - a free loan!)

Are you an idiot to keep paying your mortgage?