It's being addressed as we speak - email addresses will be hidden as a priority precisely because there have been verifiable cases of harvesting.

Currently I believe bugzilla is closed unless you have a valid account, ie. it's not currently open to anonymous access but such access will be permitted once patches have been applied that anonymise users. No ETA yet, but it's recognised as being a high priority issue.

https://bugs.maemo.org/show_bug.cgi?id=1383