Hoodbhoy is more concerned with authorized misuse of nuclear weapons, not about them getting stolen by ragtag Talibans. The guy has a point, however lame it might be.
Here is the technically important part regarding nuclear weapons safety:
As far as the confrontation part is concerned:
1. 1987- Mere verbal threat. Pakistan had no deliverable nuclear weapons at that time.
2. 1990- Nothing was THAT serious IMO.
3. 1999- Pakistan had deliverable nuclear weapons, but unreliable and less survivable delivery systems. Again, more verbal threats.
4. 2002- Likely possible.
5. 2008- Pakistan did start considering preparation.