Maybe it's a stupid question but... why didn't you create a self-moderated thread?
Self-moderated threads also mean that observers cannot tell whether the deleted posts come from any particular source.
This increases transparency, whether you agree with it or not.
Can't link a flag to a locked, nor self-moderated thread. As previously stated, the system is severely broken.
I suppose the idea is to incur more free discussion of the flag. In the instance where a flag is questionable, users will have the ability to point out the flaws in the argument. However, this is assuming that proper discourse follows from it.