Where I work, we use Bugzilla extensively for bug and feature tracking. We take advantage of the built in milestones to help us manage our timelines better, but sometimes priorities shift and milestones need to be rearranged. During this time we use the "change several bugs at once" feature to move them around, but the result is a ton of bugspam for everyone involved (except the person actually doing the changing, of course).

Is there any way to easily turn off emails if many bugs are being changed at once?