I had them call me today. They were quite polite... When you don't speak English to them. I ALWAYS answer the phone from a number I don't know in Spanish. Hell, my Spanish sucks too, any High School first year Spanish class student is better than me; But that's besides the point here. I always answer the phone with a 'Hola' and say nothing more. Let them do the talking. All you need to know is two more words, 'No' and 'Si'. They figure it out real quick that you don't speak their language(those racist b@stards!) and quickly hang up.
I am not a f**cking researcher dude. Get over yourself! I am entitled to my opinion. Just like someone else already mentioned on here you don't get these phone calls for no reason. They don't magically get your number. You have bought something, signed up for something, or something else that YOU put your phone number down on. So technically you are responsible. If you don't want calls then quick pimping you phone number. Call me what you want. I really don't give a [***]. I came to this website for the same reason as most of you. I posted my comment, and have been ridiculed for it. My job is legit you disrespectful piece of sh*t. Have a nice day!