This guy took out a string of women, many of them seem to have only the most tenuous acquaintance with [one was the sister of one of his employees!]
Now really, if the boss of your sister wanders over to you apartment, chats you up for a while and asks for a hug, would you give him a hug? Would you even have invited him inside in the first place?
Heck, I know the relatives of the person my brother works for and I am not on any terms where they would even come close to my house…let alone invite them in for a drink and quick death … Only people that come into my house are the people who live here, or are invited over specifically. There is nobody that just ‘drops’ by and if I am home alone I don’t tend to even respond to a knock at the door.
Once the murderer had gained entry into the house, it didn’t matter to the murderer whether they consented or not.
Not all of them invited him. Those who did, probably already knew or trusted him enough to let him in.
It’s a matter of trust and vulnerability, and unfortunately in our society deviants take advantage of this trust. I don’t believe this can be held against the victims, since they had no clue as to what would transpire.
If you review events in your life, you will find that most of us, if not all, have at some point or the other been in situations where we were vulnerable to the whims of strangers or acquaintances we hardly knew.
You might argue that we need to protect ourselves in every way we can, but the balance between safety and practicality is indeed delicate.