:: I think that the picture still needs to be changed though, as it is misleading for these reasons: 
 ::* The hydrogen atom does not ionize by itself unless it is in an appropriate solvent, say, water. This should be indicated somewhere, perhaps this reaction with the solvent should be drawn explicitly in the diagram.  
 ::* The diagram depicts the resonace incorrectly - the negative charge does not reside on the carbon atom - rather it is "shared" between the two oxygen atoms. Either we draw an extra resonance diagram where it clearly shows how the charge bounces around the two oxygen atoms (along with the push arrows) or we enclose the whole ionized molecule in square brackets, and indicate a negative charge on the outside of it, like [CH3COO]- . What are your thoughts?