Obviously exceptions exist, but my point is that the majority would take an unnecessarily long amount of time to get an effective lock in. It also occurs to me that (atleast here) putting someone in an armlock, and then breaking their arm would be illegal. A friend of mine who works in corrections has said that putting someone in a joint lock would render them immobile, and attacking any further would be excess force. I'm about to get into a tirade about how much I hate the rules used in basically every fighting sport, so I'll just say 'I agree with alot of what you say' and leave it at that. My comments about anything else will be left for a different, more appropriate thread. That's the way it is in Judo, but Rocket3 implied that he wanted to place emphasis on Newaza. The easiest way to do is to get rid the Ippon rule. This, however, would basically turn Judo into BJJ.