I have to disagree. I've had to manage a team of around 40 people who compete nationally (not tech per se, but I believe the same applies in a work place), and

I have to disagree. I've had to manage a team of around 40 people who compete nationally (not tech per se, but I believe the same applies in a work place), and it only takes one person with the behaviour you describe to completely wreck how everyone operates and gets along. We went from a tight knit, supportive group to being watchful of what we say, wondering who's out to get us and generally having to "watch our backs". Loyalties were split, motives were changed and within a matter of weeks it was an incredibly poisonous atmosphere. If you want to get ahead - be better than those you're competing against. Don't try to undermine them, it does get noticed and unfortunately - for a small personal gain you're causing a hell lot more damage without even realising.