Telemarketing

I hate to answer my phone everytime somebody call.  Usually it is a telemarketing calls or collecton agency.  Even i already added our number to donot call lists, we are still getting this calls.  Like earlier it was already after 9pm.  My phone rings i answered it thinking it is an emergency call because it is already late.  What the heck it is the Owtell.  Trying to convince me to use their product hello it is bed time here in America.  i know in Philippines it is day time.  how can you get any client if you don't consider what time you will be calling your customer.  I felt bad who ever i talked to because I kind a give him an attitude.  Maybe he will learn a lesson not to call to late at night.