It can I suppose make you vunerable to the real world. But thats the beauty of it that in opening your self to the world and all the crazy possibilities it presents you make yourself open or "vunerable" to life.
I don't know. Sometimes I do get really shy about it but mostly I just try not to think about it. And sure sometimes Ne fucks up and I end up in shit but I'd rather climb the mountain and fall off than not climb at all.