Yes. I don't type it unless I'm actually laughing outwardly.
I'm always giggling or chuckling outwardly when I type it, if not outright laughing.
If it causes me to snort, that counts as an "LOL" for me.
I'm always laughing/giggling/chuckling internally, but not usually outwardly so.
Not outwardly, but I usually do so internally - though not always.
No, usually I'm not doing so either internally or outwardly; it's just a word in my vocabulary.
Other - plase comment.