As you know my experiences were somewhat similar to yours, however my own take on this is slightly different.
I have almost entirely moved to a new city, the school where everything happened has closed down. i do not know or care or give a rat's rear end where all those people involved in my abuse are now, indeed on the one occasion I met someone from that school, three years after I left, (a person who had been present but not participated), when she asked "did you go to xxx school" I simply said "no" and left it at that.
I suspect this feeling is mutual, after all those involved in my abuse didn't particularly care or see it as important, but who cares! If I heard they were all in jail or had died on a bus trip or had been skinned alive and eaten by cannibals, well my response would be pretty much the same ---- "meh"
Indeed if I remember rightly about six years ago there was a news item that one of the boys who had been involved in the physical violence end of things had been shot in some sort of criminal incident or other, (it was that sort of school), ---- though again, "meh"
There are enough reactions and responses and things in myself I cannot! change, I'm not going to alter the things I can just for a bunch of idiots who couldn't care less, neither am I going to change things that are important to me just for them or indeed anyone else.
It's also worth noting that to be honest with the internet you do! leave a traille just by being online, and short of using some major anti hacking software, changing your Ip address, deleting public reccords and the like your actually not going to disappear, so you might as well just embrace the positive aspects of this and claime the credit you deserve.
I am myself listed on the university department's post graduates list, (and soon you'll be able to read my doctoral thesis online), as well as listed as being part of Aims music school performances (there are even some photos of me). I am also listed as belonging to Music for life, the charity who sponser disabled musicians. All of these are things that just happened as a consequence of what I do, my music and my academic career.
In addition I work as administrator of www.audiogames.net
, and as an expert on accessible computer games and show up in various places in that capacity. This is something I choose to do with my time, it is a worthwhile hobby which has turned into something of a volunteer vocation, contacting game developers and discussing how to make computer games accessible to visually impared people, and then writing about such games and cataloguing them on a database, ---- oh, I also obviously show up playing various games as well for both testing purposes and for personal enjoyment, (which are not always the same thing).
These are the online presances I know about, and frankly it's part of what I choose to do with my life and my time and part of the impact I try to have on the world.
I'd therefore Lee suggest you just do whatever you feel you need, take credit for your accomplishments and let your tallents and creativity have full rein, since your denying everyone else what you have to offer otherwise, and if you do! ever run into the online presence of some bad person from your past, (or indeed any bad person at all), --- well that is what "ignore" buttons are for, and if that isn't enough, well this is why safe net environments also have moderators.
Btw, I don't myself use facebook, simply because the interface is a pain in the rear with a screen reader and because I really can't be bothered to go through all the trivial endless "I've just had breakfast" type of messages.