Since this is entirely inappropriate, without due cause, for a Christian who has come to worship God, the point is moot. The same goes for leaving services early. Experience testifies that coming to Church late is more a matter of “habit” than circumstance: there are those who come late, and those who don't. Some rules of thumb: Those who arrive late should generally refrain from partaking of the Eucharist that day as “proper preparation” for Holy Communion assumes the ascetical effort of arriving on time service.
