You answer the call and nobody says a word, yeah, that will certainly result in a donation, slimeballs.
 Nov 23rd, 2010
These calls are from "The Share Group".

Their website states
"Our core business is comprised of outbound telemarketing services: fundraising, membership mobilization and affinity sales calls. We are however a full-service provider, with offerings that include inbound calling programs, activist recruitment, online giving options, e-mail address collection and e-mail pledge fulfillment."

If you call the number back, you get a recorded message stating something like:
The number you have called belongs to "The Share Group", a call center for non-profit organizations which you may have donated to in the past.... you can select Option 2 to have your number taken off the call list... but it may take up 72 hours for your request to be processed...
 May 27th, 2010
Call coming everyday at 1pm. Very annoying.
 Mar 15th, 2010