I was looking at the achievements and I noticed that some might actually have a negative impact on the value of this SE website.
- Vox Populi/Civic Duty (Use the maximum 40 votes in a day/ Vote 300 or more times)
May cause people to spam votes in order to get the achievement.
- Cleanup (First rollback)
I'm not even sure on how to cause this, but I don't believe it's a good thing. Nor should we make people try to get a rollback (for the achievement) I believe.
- Disciplined (Delete own post with score 3 or higher)
This is never a good thing?
- Peer pressure (Delete own post with score -3 or lower)
This requires you to have a -3 post to begin with, so one could, purely for the achievement, attempt to get a -3 post?
It's all a bit theoretical but, the effect isn't easily spotted, so could be bigger than sensed.
(p.s. I found that all SE sites have these achievements, is this meta still the right spot to post this? Or should this be on general Stack Exchange meta?)