Is it possible to customize the labels of the Project Reports Menu?

Not yet. See the related issue: MPIR-35

How to exclude SCM access info?

See the SCM report documentation.

How to hide developer/contributor email addresses?

You could use services such as reCAPTCHA Mailhide. In this case, just replace email by the given URL, for instance: ... foo http://mailhide.recaptcha.net/d?k=01ebFB9eM2hZL-T96IpUgRmA==&c=AI-pouLFNTr5xMTBVDaj8iKeIFI5dy9Wj5cxSY0Nuhw= ... ... ...