Signing up -- Ok, whatever, good to give some users some points.
Recruiting a new user --Argh, referrals, viral... No
Adding your first avatar -- Not like avatars
Writing a blog article -- I have a blog
Having that article hit the "Blogs" page -- Dosn't make sense
Voting for an article --PU-LEASE, you'll have people voting on everything
Leaving a comment --Ditto, First post galore, I don't like this "vote system"
If your comment gets a thumbs up --Ugh
If another user ignores your comments --Uuggh, popularity contest
Editing a page in the main namespace --Imo, the only real thing that counts
Rating a page -- Voting, raiting? HUH
Adding a friend/foe --Foe, BAD IDEA
Giving a gift --Huh?
Receiving a gift --Huh?
Taking a poll -- Ugh, again not want
Answering a quiz question --grr
Creating a quiz question -- You guessed it
Have the most points for a week -- So... "the person with the most points wins, forever"
Have the most points for a month -- See above