Double click to start regular chat with people

It would be nice, if all you had to do to start chatting via text with someone, is to double click their name. This could be an option you could use if you wanted to, by changing it from options. A minute change, but it would really save a lot of time, if you chat with people a lot like I do. Also it would stop me from scaring the hell outta my friend, by not accidentally pressing "call".