I do wonder if this word is even appropriate to the situation. Using twitter seems akin to stepping on a soap box on the town square and shouting every single word you say.
Maybe nobody will pay attention to you. Or maybe you'll get a crowd of people who think favorably of you. Maybe someone else will step on his own box and have a conversation with you, but still there for everyone to hear.
And it goes even further, you even have an official scribe who records everything you say and then pins it to the great proclamation board of the city plaza so that everyone who was not there at the time can still follow what you're saying.
This is an incredibly public mode of conversation that people don't realize what they're doing.
And well, if you say something that people disagree with you will get booing, hissing, insults, threats from a whole mob... maybe just because you're too loud. This would be the risk if you stepped on a box of a real place.
You have to realize that the mob shouting you down probably doesn't really mean to attack a person. It is verbally attacking a public speaker on the city plaza. You get treated akin to an unpopular politician, not as regular citizen discussing things with friends.