In 4e, why on Earth would you care? Alignment has no mechanical impact to speak of for PCs in 4e. It is a quick guide for DMs on how monsters might behave, but for PCs, it's pretty much irrelevant.
When I run a game with stronger alignment impact: actions dictate alignment, not the other way around. So, you don't reconsider an action because you are a given alignment, but because you want to be a given alignment.
When I run a game with stronger alignment impact: actions dictate alignment, not the other way around. So, you don't reconsider an action because you are a given alignment, but because you want to be a given alignment.