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I've enjoyed a number of the legitimate (i.e., non-fee-involved) challenges that pop up...primarily at the invitation of others. And I've enjoyed exchanging plants and creatures with folks. Bottom line, though, is that one cannot save any portion of a rain forest unless one sends out plants or creatures. If this is resented, then private communiques should be issued and cease/desist requests should be made.
Frankly, I've got a string of folks on my friends list who requested to be friends who've said diddly to me and have generally resisted various forms of communication.
To that I say, "What the hell!"

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I doubt many people resent the use of the Facebook extras. They may not get it or not be interested, but I wouldn't use the word resentful.
I know a number of people who sign up to just to find out what Facebook is all about, or because they are looking for someone. They aren't interested in the rest of it. I'm completely surprised I have been having so much fun with it.