Carelessly pressing the wrong button can send something that the user didn't actually want to send and it can't be called back. A question can also sometimes result in a misunderstanding.
有時還在思考中的文字，一個不小心的按鍵碰觸，就可能發送出去，卻追也追不回來；意思表達不清的問話，也可能引起誤解。