Here's some information that might be helpful in some situations where you're trying to stop ColdFusion 5 (and earlier) but don't want to (or can't) use the stop script. But even then, there may be a very rare circumstance where you cannot even kill the processes as root.
This might also be helpful to better understand how the many CF processes (threads) show up on Linux. The process trees show the relationship of the pids in the tree, and its easy to see what pid is the parent and which are the children.