Comment by icebraining

It's against the law.

The courts in my jurisdiction disagree, but in any case, I wasn't making a legal argument, but an ethical one. Unless of course you consider that any illegal activity is necessarily unethical, in which case we have nothing to discuss.

You can play the music you bought for other people for free

Not freely, I can't, only under the very restrictive limits of fair use. But I grant you the analogy isn't good. In any case, the point stands: why should I get to decide who can do what with the works (in my case, software) I produce, after I sell them?