I agree with you that the amount of these is very important. Obviously someone telling a white lie every once in a while is not nearly as risky as someone who lies constantly about important things. There is not going to be some bright line cutoff between these. But these are signs that someone is harmful, and the more of these they do, the more I would personally predict they are likely to be harmful (for most of these traits – though I didn’t write this list, it was crowdsourced).

I feel this is a particularly unhelpful list of traits as not only are these the traits that pretty much everyone assumes are relevant (so no new information) these are all traits that *every* person or relationship will have to some degree or another and are described in a way that could fit virtually any relationship or interaction.

Re: Manipulation: Is it enough that they tried to dress up when they saw you early in the relationship and be on their best behavior? That’s literally such a universal human behavior we have entire comedy routines about people avoiding bodily functions or being extra courteous around a new partner.

Re: Dishonesty: If you meet someone on an online dating site and they admit that they listed hiking as a hobby but only really does it a few times a year when a friend invites them. Does that qualify? What about someone who exaggerated their height?

And every last quality has this feature. What kind of information does that provide?

I fear, the kind of person who is overly concerned about bad individuals will use this as an excuse to avoid giving someone a chance while the kind of person who is inclined to ignore red flags can wave them away for the same reason.