the sad thing is while this could be legitimate, PCG needs to cater for it's entire audience. unfortunately there is no word filter on vent, so they have no way to protect the people who would be offended by it.
so it is just unfortunate that until they find a way to censor vent in real time, there is a lot they can do. it's just like if you went on the TV/Radio they would censor any unsuitable words used.
I notice you mention the WoW guild but the same rules apply there, if you use bad language you will be warned if you carry on you will most likely be muted for it. it's just unfortunate that when you are in a group of people you need to take into account who will get offended and who wont as different people have different tolerances and they all need to be taken into consideration.