If you don't feel supportive of that zeal, or are on the wrong end of it, extreme zeal can be quite off putting.

That being said, it is far from the worst part of the community, that is by far reserved for the bullshit that some community members have pulled on those of us that are female. I've seen talking down to active Ubuntu Local Community heads at conferences and local happenings put on by said Ubuntu LoCos and it is HORRIBLE. Why the fuck do certain people feel the need to repeatedly harass a volunteer?