If someone says just hello in a chat window I don't respond and if it's someone not in my team and I can I might block them as well. They want something and wan

If someone says just hello in a chat window I don't respond and if it's someone not in my team and I can I might block them as well. They want something and want to expend the minimum resources on pleasantries to get it. That means they're rude. If you want something get straight to the point or we can have a pleasant chat for hours about the weather and our pets.