Recently I sent DMCA notice to Dropbox to remove my work from one of their user's public folder. Which was basically used to host images. They responded quickly

Recently I sent DMCA notice to Dropbox to remove my work from one of their user's public folder. Which was basically used to host images. They responded quickly to my request. I am wondering if this is a true reason, and not showing dropbox splash screen. It is so easy to share files with their public folder right now which might cause copyright problems in future.