Liquid,
Just curious, but where do you live that it's illegal?
I'm way, way too new to comment on the advisability of diving solo. I sure wouldn't do it now after 22 dives, but it seems to me it's kind of a twofold question. One is a) whether it's a good idea or not (and would have many answers) and II) is it morally, ethically ok to dive alone?
To part a) I would not hazard a guess except to think to myself that it's a pretty complicated question, depending on many conditions, personal, situational and environmental. To part II) it seems to me you get to do what you want with your own life. Like smoking is way, way stupider than diving alone (IMO) but I wouldn't make it illegal.
Terry