Welcome to the Forums and FeralHeart Game of Course, Nice to See another member on Here... Hope you Make a lot of Friends.
If someone is being Unkind to you in the Game Just Simply click M and there are Tabs witch say Friends, Requests, and Block. Then Double click the User/Character and it Will bring up Whisper, Add Friend, Party, Group Bio and Block, Simply Click "Block" Then they will disappear and appear on your Block List. (Double Check if you Blocked the Right Person.)
Hope this Helps, Enjoy.
~Elixir~