Because of this ethical question the freezing of fertilized eggs is illegal in Germany. So cautious people can come to this conclusion.
But this is the other extreme endpoint. With "a compromising time limit solution" I meant something like the around 15 weeks common in European Countries.
Let's just say that it is murder/abortion of 6 fertilized eggs. However, many people are fine with such murder, as they are with the murder of lettuce leaves.
It seems the issue is always what is being murdered. The more human-like the thing being murdered is, the more outrageous it is. Plan B, not so outrageous because it's just a few cells. 20+ weeks, people are getting outraged. A dog? Pretty human-like, people don't like dogs being murdered.
Plan B is not an abortifacient. It prevents fertilization from ever taking place. Anyone against Plan B is entirely making an argument about casual sex.