There's a big difference between people feeling intimidated and actual intimidation existing.
You're right; there is a big difference between the two. And I have to say that I have rarely seen what I would consider intentional intimidation tactics on the part of the regular site members. However in practice, it doesn't really matter whether someone was intentionally intimidated or whether they just felt intimidated. The result is often the same: most stay silent, and a few react by becoming belligerent.
I'm not trying to pick on anyone. Just pointing out that intention and effect aren't always what we intended from the outset
To another topic; on the bubblenesting front: I have one boy in a community (Ryu), and two solitary (Windago and Iruka). Windago blows nests about once a week, I've never seen Iruka blow one (and by all appearances he is the healthiest most viberant one of the three), and Ryu blows them only occasionally, but is the most active. Swimming around exploring (patrolling, maybe) his territory.