Loopsdefruits "You need to know whether the manly looking woman is trans (so actually a man) so you can complain that she's in the women's bathroom/changing room/brownie unit, if we just let people live their lives and responded to actual problems rather than potential for problems, 9 times out of 10 everything would be fine."
This kind of shows you are not really up on the current thinking that a man is a woman just because he says so, because if you were you would know that despite it not being law that a man is a woman because they say so, and vice versa, some organisations will act as if it is.
So to be a girl in Girl Guides all you need to know is that you think you are a girl.
and
"Am I unusual to not regard every male person I come across as a potential threat? Should I be more concerned about my male friends?"
No, I do not think you are unusual. I do not regard every man with suspicion at all. But if I was on a bus or train late at night, or in a car park late at night etc, or even a deserted one in the day; I would be more aware if a person in the same vicinity was male or female. And I've fortunately never been attacked in such a place. So I can only imagine that many women may well be much more cautious than me.
I think trans woman in female prisons, who have transitioned to get out of a male jail, may well be a lot more of a risk than a male prison guard who is employed in a job with a pension etc.
And it is not just me who is concerned with male prisoners transitioning to get into female prisons. This is old, from 2015, but I think it has some weight.
British Association Of Gender Identity Specialists - written evidence | PDF version (PDF143 KB) is a letter to Maria Miller from Dr. James Barrett (President, British Association of Gender Identity Specialists) dated 20 August 2015.
The letter is ref TRA0149 and can be found at
www.parliament.uk/business/committees/committees-a-z/commons-select/women-and-equalities-committee/inquiries/parliament-2015/transgender-equality/publications/
Once you click on the web page you go to the bottom, it says "Written evidence",
and you need to click
“View all”
and then order by reference number to easily find ref TRA0149
One of the key bits to worry about in this long letter is about half way down where it says...
"...the ever-increasing tide of referrals of patients in prison serving long or indeterminate sentences for serious sexual offences. These vastly outnumber the number of prisoners incarcerated for more ordinary, non-sexual, offences. It has been rather naïvely suggested that nobody would seek to pretend transsexual status in prison if this were not actually the case. There are, to those of us who actually interview the prisoners, in fact very many reasons why people might pretend this."
You can read on if you wish, or I can post it here......