Easy 10
Brain dead MUG SHEEP
These people are supposed to be racing each other and self preservation also enters the equation. The result of a near accident was that Lewis gained a few feet of track which he immediately relinquished. How can you be behind a car, travelling slower and still be deemed to have an advantage.
I have seen this type of 'overtaking' incident happen many times in F1 and providing the place is given back there is never a punishment.
The fact Lewis overtook Kimi straight afterwards is almost an irrelavance - next they will blame him for Kimi spinning off.
Perhaps they should abolish those run-throughs on chicanes then, and just have kerbs. That way, you either make sure you can get through before reaching the chicane, or tuck in behind, or go bouncing over the kerbs, or crash into the other car.
Having a sneaky little run-through is always liable to lead to calls of "foul play" when someone takes the short cut.