The American Eagle pilots used to have a nice forum. Much better that ExpressI (which was way better than none).
Suddenly one day it disappeared as well. Rumor has it that management threatened to sue the webmaster/founder (an AE) pilot, so he shut it down.
Speech may be free, but the cost of speaking can be high. If you don't have the money to back it ......... oh well.
Sites like this one don't have the same problem because they are not operated by employees of the "upset" company. However, individuals are still responsible for what they say.