Upload dialog/Design/Bad uploads

There are have been several bad uploads using this tool, most of them copyright violations. An A/B test was conducted to find a better way to educate users about Commons, but the results aren't in yet. More details on Multimedia/December 2015 cross-wiki upload A/B test.

Possible reasons for bad uploads

 * Not understanding what kind of files are helpful for Commons and other projects (selfies are useful for social networks, for example).
 * Not understanding the meaning of Own work.
 * Not understanding the basics of Copyright law.
 * Malice.
 * Disregard for legal notices (they aren't enforced as often on other websites).
 * The context of the upload, that is the page it is being uploaded from is forgotten or ignored.
 * Just testing a new feature, unaware of side-effects. Since the user is in an in-progress edit (until saving) it may not be obvious that the image gets public as soon as it is added. (Do we have numbers of how many of the bad uploads were not finally saved on the page?)
 * Repeated behaviour. The user uploaded a bad image before without noticing it, and now does it again.

Proposed solutions
There are two types of solutions being proposed, one than improves education, and the other where some kind of data is collected, either discreetly or through a form and that data is used to help editors while they're patrolling.
 * https://phabricator.wikimedia.org/T120867#1914007
 * https://phabricator.wikimedia.org/T120867#1903246
 * https://phabricator.wikimedia.org/T120867#1887088
 * https://phabricator.wikimedia.org/T120867#1868598
 * https://phabricator.wikimedia.org/T120867#1884287