If you put in rules to follow people simply won't. Especially trolls. That's kind of part of their definition, isn't it? But what people forget is that you can

If you put in rules to follow people simply won't. Especially trolls. That's kind of part of their definition, isn't it? But what people forget is that you can communicate without text boxes as well. There are already social non-verbal communications in place. Simple examples are liking something, sharing it, seeing a group post or chat message (with or without responding). Being online or not is also a way to say you want to communicate or not. It is possible to force people into a non-textbox communication by giving them buttons instead. Sometimes both options (text and button) already is enough for people to use the button because it's simpler. There are also experiments to fight trolls by only giving specified communication buttons instead of text boxes, e.g., in the online card game Hearthstone. One problem you can't fight that way is the problem of interpretation. In the example of Hearthstone the winner of a card game might say "Thanks" hoping to end the game with a polite statement, while the opponent who lost might interpret it as "haha, look at how I beat your ass, noob". Spamming and Trolling is also still possible, because you can make anything annoying by doing it too often. E.g., someone you just added to your FB friendlist goes through your history and likes every single status message, uploaded picture and shared link you posted.