I am very new in this matter but to me it always seemed that there is more to use of illegal software then just moral issues. If this is the case then I think I had a much more restrict image in my head then the one that reality offers. I was under the impression that publishers require software licenses, work files and all other development-related informations.

So to summarize: Only time when legality of software is relevant is when someone sues you and you have to prove that your files have been created with legal software?