I've been doing the same thing. Won't say which progressive sites, but I told off a couple in no uncertain terms for their most recent hard push, which included inexcusable attempts at embarrassment if not downright shaming. My explanations to them were far less gentle than Hekate's. I told them I didn't appreciate emails headed "Your Name - NOT A DONOR" and even one in bright red letters declaring "last notice" like they were bill collectors and I a deadbeat debtor! I also wrote President Obama about some of the terrible things being done in our party's name, since I'm sure he never sic'd the fundraisers on widows, orphans, and little old ladies on SS. I don't mind and do expect normal fundraiser emails at certain seasons, but damned if I'll put up with something that sounds like it came from Sam(Stan?) Kennison.

Actually, the two that made me angriest also got my worse insult. I told them they sounded like REPUBLICAN VULTURES.

But I kept my favorites, especially since they offer me the greatest # of petitions to sign, and those can be powerful tools.