This is still the internet, if you are expecting a perfect community with welcome and smile .. you are going to have a bad time.

i was a GW2 player THE NICEST community i have ever seen.. yet profanity still happened in dungeon from time to time
I was a WoW Player, the pug experience WAS SOOO BADDDDD, yet after i find a guild i begin adding people to my friend list

if you want to completely shield yourself just run with a guild.. PUG means random experience