Well MrkLin, you're doing plenty of writing here. It may not be details of your sex play but people will know enough of what you do when you post on a swingers site and have a link to pictures on your Swing Lifestyle profile.
You might as well add your SSN and active bank account number in your signature line here.
If anyplace, the internet is the easiest way to expose yourself and you've done just that. Your Swing Lifestyle profile has plenty of public pictures that any relative, neighbor, co-worker or friend could identify you and your wife by. The fuzzy face thing doesn't keep you anonymous from those who already know you. So I'll turn your question back to you, You might not care what others think of you, but try to respect the others in your life. Why screw up their lives because you had to jot down some notes?
You are definitely a notetaker, a journal keeper, and thousands of people who visit the Board each year have read what you've written and will continue to do so for years to come.
A journal under a mattress has less significance or chance of affecting your life than your present exposure on the internet.