It can be kinda easy to sympathize with him, because reading those conversations you get the sense he just chose to treat Twitter like it was AIM or any other private instant messaging program, and momentarily forgot or disregarded the fact that the entire conversation was completely public.
At the same time, how could you forget that Twitter is entirely public? I am a pretty low-level cog in a mega-corporation, and I have been conscious enough to never ever discuss my work outside of an anonymous message board. Not when I've had a shitty day, not when a customer or client treats me like crap, not when the executives make some stupid decision that enrages all our potential customers. In that sense, it is hard to sympathize.