Balloons - Do the parks really need to sell them?

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I love to see them at MK, those big groups of all those colors... makes me smile. Never bought one but I have been with people that have bought them and they even had them DEflated before leaving to fly home with them. Some just love them.
I’m not personally overly concerned on the impact of them.

Lol I have a sliver Mickey one from my honeymoon 28 years ago in my a box of mementos. I can always go and get it inflated again.