What was the unacceptable behavior? Unacceptable behavior as an indicator to violence seems to take two broad groups. One group can be acted on in the practical sense, one group simply cannot be acted on in the practical sense.
From what I have seen, Robinson was in the "cannot be acted on group". For example:
- Robinson was not say, torturing animals, there was apparently no documented history of threats to others, no pattern of suddenly retracted domestic violence complaints, no fascination with weapons beyond the norm for the military, no open political extremism, open interest in say, rampage shooters etc.
Rather, Robinson's past unacceptable behavior was apparently very "soft" and perhaps included:
- Viewing himself as an Alpha male, was shallow and always at least slightly self centered- even with male "friends", has no true friends, just aquantiances. In relationships with females, he is dominating, but non criminal. Enters into unethical sexual relationships etc.
We have all known people with various soft indicators. A significant number never commit any crimes (well, at least not on paper- "in spirit" can be different) at all, let alone murder. Pre emptive action against the soft types would be centered on: "I deem that you are not a "good" person and therefore, might commit a crime.... This is simply not sustainable.