I have no qualms about removing the DRM on ePubs that I’ve purchased. The file becomes portable so I can use it on different devices, and future proof of I ever lose access to the account, device, or if Adobe’s auth servers ever shut down.

I’m happy that the author and publisher gets paid, and I get the book I want. To me, toss is preferable to piracy, though I understand why people would just want to skip the extra effort.