@Wayne
Several of those icons come from icon sets that are ONLY available on the official MorphOS CD or on the MorphOS FTP (only available to Pegasos owners). They were produced under licence. Ergo, their use by someone who doesn't own a Pegasos or a MorphOS CD is piracy. Say what you like, that's the law. Whether or not they're used in a screenshot is immaterial.
I can distinctly remeber Toaks claiming to own a Pegasos 1 at some point. If he still has it, using icons from it on another system can be viewed as no more legally dubious than any emulation, surely :-?