Take this for an example, you have a group of three forum friends here. "billy242", "sol5" and "xXDarkXx". One day, billy posts something stupid. sol and dark will both call him handicapped or stupid regardless of what their friendship status is here.
This is Temperamental Friendship. It's very bad, too. It can mean that very many people here have trust issues, that they are bad at social interaction and etc.
So, in order to fix this, be nice to friends. It's very stupid to act like you have no idea why your friends don't like you anymore, it's because you diss them every chance you get no matter what.
And you can still correct people without being an ass, too.