Time Machine and Xcode Love Disk Space

I was idly looking at my Time Machine backups today and noticed that Time Machine backs up Xcode's build directories. It struck me as wrong because, after all Backup Core provides a function to exclude files and folders from being backed up. Xcode should (maybe optionally?) call this against all built product directories and intermediate product directories.

This is bug 5696811 and was filed on 1-20-2008.