I would really like to see the Severity field removed from the bug entry form. A few people use it correctly to mark their bugs as enhancements or trivial, but most users just set it to "blocker" because they think it means "how important is this to you?". Obviously everyone's bug is important to them, but that doesn't make it a GCC release blocker.
If we have to keep it could we put a label next to it explaining what it's for, and requesting users to engage brain before choosing "critical" or "blocker" ?