Is moving worshipers to find a space in the first row considered a disturbance and a harm that necessitates sin?

The questioner is advised to hasten to prayer to attain the reward of the first row and to arrive early at the mosque.

As for moving worshipers to find a place in a full row, it is not permissible. This is because it involves harming and disturbing worshipers, and interrupting their devotion. It is prohibited to make a person rise from his place or to cause him discomfort, as the Prophet, peace and blessings be upon him, said: "There should be neither harm nor reciprocal harm." Furthermore, disturbing worshipers leads to spoiling or diminishing their worship.