No one would know that you have been on the site usually....but 192.com has a service where you can be emailed if someone is requesting information about you. This is/was only available in the professional version.
create yourself a hotmail email address, use a false name and address to do this.
Then using your false name and a silly name like [email protected] address (ie grtesef @hotmail.co.uk) register with the sites and search for yourself sea princess and if you can't find yourself you will then know for sure that no one else can
'not even the beckhams can get out of that one'...oh yes they can...and do.
192 relies on PUBLICALLY available information. No matter what you do you cannot 'erase' yourself totally. The only way is to change your name and become a hermit. Welcome to the free world. Forget it and move on.