Take The SLady bitshorpe Incident, as an example... The issue wasn't my blind faith in the wordfilter but rather the immediate side effect of not being able to modify the post to correct the vocabulary.
Had I previewed the post, noone would be any the wiser, but I knew what I had typed and so pressed Post mollycoddled in the assumption that the word filter would do its thang
Is it my fault that I typed it? Clearly.
Could I have reasonably expected the filter to pick it up? Yes.
Having just posted, could I have reasonably expected to be able to edit it? Yes.
With that in mind, with whom does the fault lie? Operator? Programmer? Both?
Working on the basis that both Operator and Programmer are Human, and therefore falible, the Programmer can only fix bugs as they arise, for example when the Opertator does summat unexpected, usually without thinking.
You're mission, should you wish to accept it, is to try and work out what, exactly, the Operator did to expose the glitch... Good luck