Hi Sabrina
great to swap plants. It is nice knowing people, who you know will appreciate them. My children aren't fond of daylilies so I enjoy reading these forums. As well as learning heaps. Swapping is some insurance against losing a plant to theft or disease. However, people move so it's not always a reliable backup.
I don't mind people taking flowers or cuttings, but not the whole plant. It's nicer if they ask rather than just taking. I once didn't take a cutting of a double pink hibiscus because the people weren't home to ask. A few weeks later they had dug out their front shrubs to do some big scale yard work. They saved and replanted most of them but not that one.