I've seen plenty of acknowledged Apple employees commenting here. I know several others who never publically acknowledge their employment, but are active here.

I've seen plenty of acknowledged Apple employees commenting here. I know several others who never publically acknowledge their employment, but are active here. The thing that they won't do though, is engage in a discussion about Apple products or features, particularly when the issue is an active industry discussion. Apple PR is very explicit about who speaks for the company, and how the company feels about unapproved spokespeople. All corps do this, but Apple takes it very seriously. For what it's worth, the people I know who work at Apple today, either directly or through acquisition, have the usual set of opinions about big companies, but are well-above-average happy at Apple. I don't know anyone who wouldn't change a thing or two here or there...and the folks that came through acquisition are more mixed, but that's all to be expected.