I understand where you're coming from. If someone does want to donate to a charity, make sure you do it as anonymously as possible! Never provide any kind of legitimate contact information or they will hound you like a swarm of mosquitoes.
I ran into this problem with Habitat for Humanity. Before Caller ID and when answering machines recorded on tape, a caller would call every day at about the same time and hang up at a point where my answering machine would run the tape to the end with nothing on it, preventing any legitimate callers from leaving a message. One day I was home from work early and at the time of the mystery calls the phone rang - it was Habitat for Humanity who I had donated to just a couple of weeks earlier. I made it clear that their calls were unwelcome, and lo and behold the "mystery calls" stopped.
NEVER give any charity your contact information! They will hound you day in and day out!
Called once while I was as work, answering machine picked up, no message. Called again while I was home, saw the number, picked up and there was nobody on the other end. I will no longer answer when this number shows up and will turn them in to the "No Call" site.
Yes, this company continues to call us. It will ring 3 times and then hang up. No message is ever left. Going to check with our phone company (Time Warner Cable) and see if there is anyway to block unwanted calls.
1-202-495-7181...keeps calling my elderly parents home...all the time...it upsets them because they do know who they are and they don't leave a message.