The LOML and I donate to a lot of organizations. I politely tell telemarketers that if they want to mail me some information I'll consider it but otherwise, I don't donate or make commitments over the phone.
It downright burns me up when I am in a line at a store and they ask me if I'd like to donate. I came there to buy something. I didn't get in line to be solicited for donations. If they want to do that, set up a special line and put sign up for it. Burns me up!