Showing just some code letters aaaa or oooo does not inform the poster
of why he is being warned.
When warning a poster, couldn't you point out that, for instance. "jon, you wrote: 'Harry is an a*sehole' and that constitutes abuse of another poster."
Or "Delph, your are writing about the constitutional row in a thread dealing with refugees and that is off-topic."
Unless, MODS, that is too much extra work for you?