20 Reasons not to edit Wikipedia
This is what I've come up with after a very short period of editing Wikipedia.
1. Endless arguments on Talk pages. Apparently more work on Talk pages than actual pages.
2. I'm most able to write about what I'm an expert in. That's also a conflict of interest.
3. Reverts may undo useful changes. There are no merge-based undos, no simple application of a diff between two revisions.
4. Improving free and open source software is both more visible and important.
5. Publishing articles in peer-reviewed venues is more important, although less visible.
6. Lack of a good, canonical, reference and citation system like BibTeX.
7. Popular topics end up better written than unpopular topics. Many entries on fictional worlds.
8. My work might get deleted altogether.
9. Wikipedia is generally not citable itself. Not reviewed, and contents are not constant.
10. There is no correspondance between the different language versions of a page.
11. GFDL is possibly not the best license. I doubt most people have read it.
12. Software screenshots must be low resolution unless the software is open source.
13. Certain topics are taboo, e.g. Encyclopaedia Dramatica
14. If I'm an IP address, nobody cares. If I use my real name, I have to be careful what I write. If I use a pseudonym and hide my identity, it carries less weight.
15. Decentralization. It is doubtful that even a fraction of people take the time to read the relevant guides on editing.
16. Same problems that USENET, mailing lists, and forums have.
17. Neutral point of view confounded by fact that most people here are fairly left wing.
18. Most people editing don't have any formal training in writing beyond high school. Most articles and topics need work.
19. Vandalism, and pseudo-vandalism.
20. Almost every other leisure activity I can think of is more rewarding; Wikipedia is just addictive.
2 reasons to use Wikipedia
1. It's generally better than a Google search.
2. If you're a cultural anthropologist, here's a minefield.
2 reasons to edit Wikipedia
1. It's a great place to practice your translation skills.
2. Most anything you write here appears near the top of a Google search.
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Needless to say, I modded this up