I keep Character Map™ at hand in Windows® just for random punctuation and stuff ©. gucharmap or something similar in Linux.
In word processors I’ve set up automatic formatting so that double minus (–) turns to en dash (–) and triple minus (—) turns to em dash (—).
Well, technically, Twitter has employees, so in very strict sense, they’re “manned”. However, thanks to these weird incomprehensible things called “current legislation” and “capitalism”, no employee is in fact personally responsible for the fuckups. And neither is the company as a whole! …Isn’t this great?