I enjoy talking to myself actually, and partly because they do not like it. I think that it is fun also. Who could sit here and just keep it to themselves their entire lives, get it out I say.
And it doesn't matter if they can hear you or not, if you are where you need to be this will not matter whatsoever, so try and get where you need to be, and it keeps you so busy but in a positive way, it is the perfect solution.
I've heard it is a bad thing to think in words, probably because it is not as clear, sort've a secondhand version to thought, a generic. But anything done right can be worth something.
Why do you care if they can hear you, are you doing something wrong, or is it only their weak and inconsequential judgements that bother you. I would advise in your situation to only learn what they are, and their judgements will seriously mean as little as they actually are. Complete foolishness and inconsequential, not to mention hypocritical, and did I mention foolish, the very thing that they seem to despise so much.
My oh my, it's as if they are in their own little world isn't it. And don't actually know what is going on, my oh my, you'd have to come up with some whoppers and good costumes to keep that from the kids and other people. I wonder if they are actually starting to believe it all.