From Dictionary.com - and I refer you to #8:
QUOTE
com·mu·ni·ty –noun, plural -ties.
1. a social group of any size whose members reside in a specific locality, share government, and often have a common cultural and historical heritage.
2. a locality inhabited by such a group.
3. a social, religious, occupational, or other group sharing common characteristics or interests and perceived or perceiving itself as distinct in some respect from the larger society within which it exists (usually prec. by the): the business community; the community of scholars.
4. a group of associated nations sharing common interests or a common heritage: the community of Western Europe.
5. Ecclesiastical. a group of men or women leading a common life according to a rule.
6. Ecology. an assemblage of interacting populations occupying a given area.
7. joint possession, enjoyment, liability, etc.: community of property.
8. similar character; agreement; identity: community of interests.
9. the community, the public; society: the needs of the community.
There is a community of interests here -- an interest in the future of Wikipedia (in one form or another), an interest in the general concept of wikis.
Now I realize, Jon, that you have no interest in being part of a community. Your style here, and elsewhere, has made it clear that you function best as a party of one. However, whether you like it or not, there is a community of interests here.
Now are we a "community" in the sense WP uses the word? Umm... hell no. I don't think there's any Flavor-Ade here.
As to editing the message board -- I guess I've seen it so often in so many places that it no longer surprises me that message board owners/custodians/administrators edit posts. They consider part of their responsibility. I haven't thought, in a long time, about whether or not I agree. It's just... there.