It's a shame that we even have to have such security plans in the first place, isn't it? People commonly use the word "animal" in a derogatory way, but humans are pretty much the worst species for what they will do to each other without provocation or starvation or anything drastic like that. There's all these people afraid of spiders and snakes and sharks, and I think, "Look at the statistics!"
Having said that, I am mostly surrounded by excellent and kind people in my own circle and neighbourhood, and there's also lots of wonderful stuff coming out of humanity.
Pepper spray: It's worth trying it out, as different cans give you different spray patterns and delivery pressure. Also apparently it goes off after a few years and you should replace it - you can test it. And you can also get little dispensers to put on your keyring as an extra. I did solo bushwalking for over a decade before meeting my husband. When I was 28 a woman my age walking solo on a beach in Geraldton was dragged into the dunes and killed. That was too close to home and that's when I got serious about carrying serious pepper spray, in a place I could instantly access it.
In all the years I've carried it, I only had to nearly use it once, when I was followed by a suspicious character on the Cataract Gorge walk in Launceston, Tasmania. I noticed I was being followed. I sped up, he sped up, I slowed down, he slowed down, I stopped and looked at a view, he concealed himself behind bushes, and I went, "OK, this is serious!" And I surreptitiously slipped the can into my hand with the finger on the trigger, and got mentally ready to just turn and cover him in the stuff if he got within range. Then I chanced upon some other walkers on the track. I joined with them and told them what was going on, and we walked the rest of the track together. I did file a police report and the police did tell me they had a rapist on the loose who'd been opportunistically attacking women for months.
You're spot on, certain behaviours show that a person really doesn't care one bit for your life or safety, and then they need to be stopped. And I will make a political comment now: In our country at least, there is too much turning of blind eyes against citizens who terrorise other citizens, or even put others at risk by drink driving etc, and too much talking up of foreign nationals and what they might do to us. In my book, the sociopath whom we've had the misfortune to encounter is also a terrorist - he sits in his place plotting how to cause harm and distress to others, and makes raids on their properties, and threatens any people present, and has done so repeatedly to a series of people he has taken a dislike to. You become relatively safe when he moves on to the next target. And the police are not interested at all, even though forensics said it was 95% provable as far as they were concerned. Yet were we to ring them and say a foreign national was buying suspicious amounts of fertiliser, they'd be all over them instantly, searching the house, going through their phone records, etc - all of which, if done just once, would likely convict our "domestic terrorists"...but it doesn't get done, unless there is a public figure involved or situations escalate to murder.
And statistically, it's our own citizens most likely to cause us grief, and I wish that the response to that was more serious.
Speaking of, I heard a podcast with an Irish terrorism specialist, a psychiatrist, and he said that most terrorists actually aren't sociopaths, as sociopaths make lousy fighters for a cause other than themselves. He says they're mostly men between age 17 and 25 with the still immature brains of their age group, and most of them, by their mid-20s, grow up and leave their cause and want to have a normal life, go shopping, have a holiday, start a family, grow vegetables, all that pedestrian stuff. That was really interesting. Also that they're not actually different essentially to anyone joining the army for a particular cause, it's psychologically all the same basic stuff, going to fight for your particular in-group. So after the age of 25, an ex-terrorist / fighter is almost guaranteed to make a far better neighbour than a sociopath who takes advantage of others. I should put the link to the podcast in: Assumptions: terrorists, music and love - RN Showcase - ABC Radio National (Australian Broadcasting Corporation)
That is an interesting series of programmes!