Looks a bit dodgy. At least if nothing else Betteridge's law of headlines says I've not been spied on, which is a relief!
Looking at the form I see two boxes left un-ticked by default, requiring manual opt-in, which to me looks pretty good from a privacy perspective. I also see the full name, postal address, telephone number, and registered charity number just below in the footer.
Maybe my definition of 'dodgy' is different from yours, because the only dodgy thing I see is the illegal spying being called out.
It's a free country though, so you are free to be extra cautious and to do nothing and hope the problem goes away some day. Also, I guess I should point out I'm a paid-up member of Privacy International so not exactly unbiased here. So far so good, no drone strikes or black helicopters yet and I sleep well at night.
[0]http://www.theguardian.com/technology/2011/mar/17/us-spy-ope...
Did XXX spy on you illegally?
Always answer yes.