Really? I don't see it as any different than an unregistered document editor saving "created with an unregistered version of X" in the comment section of saved documents that it edits. Stuff like that has been going on for decades.
Sure. Some people are fine with using free-as-in-beer software if the "cost" of that is the maker gets some free advertising. Some people -- like many in this thread -- are not ok with that. Both positions are perfectly valid.
