If on a free throw by A1, B1 fakes in a marked lane space causing A2 to violate, what is the penalty?

In this scenario, A2 is deemed to have violated the rules due to the actions of B1. When B1 fakes in a marked lane space during A1's free throw attempt, it can lead to a situation where A2, who is in the lane, reacts inappropriately to that fake, resulting in a violation. The violation is typically related to entering the lane too early or failing to maintain the proper position as dictated by the rules governing free throws.

The rules stipulate that the offensive player (A2, in this case) is responsible for adhering to their obligations during the free throw situation. As such, A2's violation is the direct result of being influenced by B1's actions, but the infraction falls solely on A2. The correct application of the rules indicates that there is a penalty assessed to A2 for violating the lane rules, thus making this the appropriate conclusion for the scenario presented. It reinforces the idea that players are accountable for their actions, particularly during free throw situations where movement and positions are strictly regulated.