@ DARKY, Locking an aircraft and shooting it down are two different ball games, there was an occasion when an IAF Fulcrum flight was locked and tailed for several miles, only after GCI warned them that they panicked and nearly crashed into each other and don't forget the famous incident where your Super Duper MKI was locked and escorted out near Lahore and same with the Mirage-2000 over Kashmir sector. Posting images of Atlantique shoot down may float your boat but it speaks volumes about IAF's morals, shooting down an unarmed aircraft, size of an airliner probably does qualify as air combat in Indian rule books but it's not how the PAF works..... ask your Gujarat's former energy minister.
The Soviets indeed left over 20 years earlier yet some PAF pilots from that era are serving in senior posts, but since you posted the Atlantique picture, care to elaborate where is that MiG-21 pilot now...... for last i heard was that he ended up as Fish food.
Albeit, the insurgents have some potent fire-power at their disposal, however, for an aircraft even an AK-47 can prove lethal or perhaps you are oblivious to an other incident when in 1971, a Pakistani ground trooper managed to shoot down an IAF Mystere Jet with his G-3 assault rifle.
Unlike some, PAF doesn't take pride in shooting down big unarmed aircraft with Mach-2 jets, however it believes in taking out superior fighters, like these two Indian MiG-21s with less capable aircraft, one was blown up by an obsolete F-86 and the other's tail was set on fire by an F-6.