Well, you do make a good point that if you are making money using someone else's material, there would be a concern. Wikipedia has a good article on the fair use doctrine, so I'd suggest you refer to that to see if it gives you comfort or concern.
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I once used a rather lengthy quotation from a well-known sports commentator in a crossword. As a courtesy, I wrote to him and asked permission, but quite some time passed with no reply so I went ahead with it. Several months later he replied to me and said he had no problem with my using his quip.
I share your view. We must acquire a permission before using others material and this is a right manner.
I share your perspective and agree with it. Before utilizing the work of other people, we are required to get permission, which is the correct procedure.
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