Personally I have found people to be rude on many, many SE sites. 😔 On a few occasions I have found that I was misinterpreting the other user's intent. I find that the skillful use of emoji prevents such misunderstandings and leads to an all-around warmer atmosphere. 😊 That is, they can make a sterile place feel more like a community of people who actually care about each other and their ideas.
So, can we use emoji in question and answers? 🤔