Personal information in sysdiagnose dumps on OS X
Let Apple Know

While no-one here can speak for Apple, you should provide feedback directly to Apple via their feedback page. The more people who offer feedback with this concern, the more likely they will be to improve and refine the reporting tools.

Delicate Balance

To fully debug a problem, it is likely some amount of personal information will be needed. If only to recreate the problems caused by unexpected paths, file, and folder names. This is a delicate balance and one where Apple needs to demonstrate to its customers that privacy is taken seriously.

As of OS X 10.11, Apple's system_profiler tool does include flags that explicitly exclude personal information.

As an anecdote, I have previously reported bugs to Apple that involved HP hardware. Apple contacted me asking for permission to pass on my Mac's diagnostic information to HP; that request acknowledged the private information embedded in the bug report. It is difficult to know if this was a single engineer's concern or something driven by an internal company policy.