This happened a few years ago. I haven't started HRT yet, but on a lot of online forums, I just present myself as having always been female. I'm sure that's fairly common here.
But anyway, I was 17 at the time. (Jesus, it's been six years already) I bought a metal detector and joined a forum about them. Virtually everyone there was an ultra-conservative, older (60+), married man. I was easily the youngest regular member, and one of maybe 3 women.
But this is where it got creepy... I shared pictures of my equipment in a thread asking us to do so. Just my cheap detector and a dollar-store garden shovel. Within hours, I had multiple guys offering to help me upgrade. These are married men, eager to spend money on a 17-year-old girl. Needless to say, I took full advantage of the situation and gave them "my boyfriend's address." (which was really mine with my birth name)
I got some brand new accessories, two separate $20 bills to put toward a new detector, at least 20 coins, ranging from just modern foreign stuff to an 1800s dime, and... three different phone numbers. I also had a few of the guys PM me and offer to take me metal detecting with them. (I'd give it 50/50 odds that I'd make it back home)
I dunno... it was really just an eye-opening experience. That was my first experience of the benefits and risks of being the only woman in a room full of men.