Good news! That’s not a commandment, it’s just part of a story, so there isn’t actually anything to follow.
If we’re playing a reenactment game instead of a follow-what-the-Bible-tells-you-to-do game, then in context the alternative is that your first born son dies and all you have to do to prevent it is put a little blood on your door for one night. Seems like a trade anyone would readily take. Also, it’s not illegal and it’s not a ritual. It’s just regular old slaughter of an animal like we do thousands/millions of times a day in society.