Those interested in gaming communities turning toxic should look at Starbound's subreddit[0] and community forums[1]. The climate's been growing increasingly hostile over feature delays, players unsatisfied with the product, and variance in community management strategies employed by its developers.

There's a similar theme of broken promises there. However, Chucklefish has been updating pretty regularly and acting on a lot of constructive player feedback, so the overall negativity strikes me as somewhat confusing.

Another rather notorious and perhaps more justifiable example of community backlash can be found by looking at forums[2] for, and general controversy[3] surrounding, Infestation: Survivor Stories (formerly The War Z).

[0] http://www.reddit.com/r/starbound/

[1] http://community.playstarbound.com/index.php

[2] http://steamcommunity.com/app/226700/discussions/

[3] https://en.wikipedia.org/wiki/Infestation:_Survivor_Stories#...