Flaming/ Flame Wars is a way of insulting people on the internet.
Trolls are people that discord people on the internet by starting quarrels or upsetting them by posting of topic messages on an online community.
Anonymous are people that are nameless or unidentified people on the internet.
Communicating clearly means that you can whisper to someone and they will clear you clearly, hear are 3 examples. Chinese Whispers, The Telephone games and the guessing game.
Permission is when someone lets you do something so for on sociol media it would be to have someone’s permission to put a picture or video of them onto the internet.
With the phrase ‘Once the message is out, its out’. I think that it means that you cant take a message back that you have send to someone wether is kind or mean.