While I agree that this thread was an example of bad behavior here at PM, I don't believe that we should be too hasty in making changes to prevent such bad behavior in the future. The current system of consideration and reaping poor nodes is both flexible and effective.
It is unfortunate that this node was not reaped (and I bear some of that responsibility -- i did not read the post closely enough and voted to keep). That is typically not the case though, and to change the rules or process by which nodes are reaped could easily do more harm than good.
I hope this thread serves as a reminder to the monks that the welcoming and gentle atmosphere of the Monastery is its most valuable asset and should be guarded accordingly.