I have a form cover letter I insert the address and date into whenever I write a donation check. It says, emphatically, do not send me any junk mail or solicitations. This is a donation, not a membership, so do not send me any "membership renewal" notices, either. Real news is all I want to hear.
As you'd expect, it's effectiveness in uneven. I haven't sent Greenpeace money in years, but still get regular junk mail. Until today, they were the top of my junk mail shit list.
Now I find out that a major owner of Massey Energy, the vampire coal company, sits on the Board of Trustees of both the Environmental Defense Fund and its Action Fund.

The most charitable explanation I can think of is misfeasance, but global warming will be definitively debunked before the EDF is back on my donations list!

(mood: furious)