Perhaps you could parse a b3d file and automatically insert auto slurping bones at such joints. They could even compress / zscale as the joint was bent.
Uhh... and THIS would be easy to code then, eh? :)
What if I WANT to make a kink like that... this "auto feature" would not let me do that! Just give us the bloody weights, or I have to show you with my monster model why the weights are needed... walk / run animations are simple stuff compared few moves he/she/it makes :)