Not yet. See the related issue: MPIR-35
See the SCM report documentation.
You could use services such as reCAPTCHA Mailhide. In this case, just replace email by the given URL, for instance:
<project> ... <developers> <developer> <id>foo</id> <email>http://mailhide.recaptcha.net/d?k=01ebFB9eM2hZL-T96IpUgRmA==&c=AI-pouLFNTr5xMTBVDaj8iKeIFI5dy9Wj5cxSY0Nuhw=</email> ... </developer> ... </developers> ... </project>
According the Maven XSD, the developer/contributor time zone fields are string so you could use a time zone as a number in the range -12 to +14 or a valid time zone id like "America/Montreal" (UTC-05:00) or "Europe/Paris" (UTC+01:00).