There are ways to get their names without typing it out. You can click on them to send a tell and then (ctrl + c) to get their name that way. Or open the battle log if you see them attacking something and do the exact same thing.

Those things being said I 100% agree with you. There needs to be a simple "report player" option attached the the right click of anyone. It blows my mind this game has been around this long and still doesn't have that.