Okay, so maybe I shouldn't have mentioned him at all you mean? Kept it private? I get that, it was distasteful of me to start talking about it here and I shouldn't do that.
Owa, what you wrote there was spot-on on-topic, about your recent games, and completely about the game you were having, so why shouldn't you post about it here? I can't see a reason why not - descriptive writings are entertaining, and I like your posts.
People joining in games do it at their own will, nobody is forcing them, and nobody certainly isn't forcing them to motormouth through it. If it had gotten too weird, you could have just left the game yourself anyway. I think you don't need any chaperones, but you're a woman on your own who can clearly take care of herself.
I found your encounter - admittedly odd because of that guy's behaviour, but I also found funny the way you told it. 
There are lots of weirdos on the PS3/online, across all games, I've noticed, not just this one. Hey, many of us (especially women, I might add) have run into a lot of oddballs in our time -- remember those stories by Nightman (not calling you a girl here, though, My Queen) with those specimens he encounters? I've heard all sorts of gaming stories from other women on this forum, too. I'm sure many have their share of odd conversations to tell.
Additionally, some of those are just drunk, high or both, and might not even remember it the next day. Some of them might just be lonely and wanted a chat - and/or found it awesome that there is a woman playing! (Yes, it is still news to some people, I've learned that myself gaming). Just like you could be approaced by someone similar in real life - which can be even scarier, I can tell you that.
Pictures or no pictures, they have nothing to do with it when you've just run into someone in a match. You can't start worrying about everyone, or where someone will see what, or you'll just drive yourself mad.
And trust me, we will run into a whole lot of oddball players online, PS3 alone is a vast network, even if we never posted one picture of ourselves, or never wrote one line on this or any other forum.
It may also be good for the soul to post about these experiences and definitely not keep it to yourself and hidden. It can be a cathartic experience to write about it in its valid thread, especially if the encounter left you with an odd feeling. At the very least, you'll likely find out you're not alone with those experiences. 