This also irritates me. A lot of people treat chat as a live conversation. To be fair, it is somewhere between a phone call and an email, as it can work both

This also irritates me. A lot of people treat chat as a live conversation. To be fair, it is somewhere between a phone call and an email, as it can work both ways. I usually ignore chat messages that just say hello, until they bother to say what they actually want. Unless I feel like actually chatting with them of course!