I checked my inbox this afternoon to find that the Iran Co-ordination Group had responded to my e-mail about the discrimination against the Ba'hai in Iran (specifically in the field of Higher Education, although the problem goes far deeper than that). It was a fairly generic "We're onto it", which directed me to the EU President's statement on the matter from February. It's nice to know someone's keeping an eye on all this stuff, and that my message got through, however little difference it made.
Update: my local MP got back to me today, too. With, annoyingly, the exact same message. My faith in politicians dies this day.