With regard to my previous posting about bomb warnings and immediate overweight landings I had hoped to open the discussion up to include RELATIVE RISKS. Most posters seem to have concentrated on what is aircraft possible whilst ignoring possible other risks.
It is an unfortunate fact of my past 40 years in aviation that every successful aircraft bombing has occurred with NO PRIOR WARNING and all other given warnings have been hoaxes.
My personal interest stems from being (as a duty travelling crewmember) once involved in a full aircraft diversion and subsequent evacuation via the slides for what proved to be a hoax. I have also experienced an overweight landing (+80 tonnes) due to multiple engine damage from bird ingestions.
Note please that I am not advocating ANY particular course of action here. I am simply pointing out, as I think the original poster wanted, some thought processes that need to be made.
One always has to be sure that one is not creating even greater safety hazards by being too quick to act. eg. Yes the aircraft can be landed quickly but a brake fire may mean that an unnecessary evacuation is required which will almost certainly injure people. eg. Having landed OK does one slowly taxy to a remote stand or evacuate (see above)
In short there are NO complete answers just a balance of risks to be made by the captain on the day.