Yet you tell us so much about yourself through your posts. Give me 30 minutes and I'll do a complete identity writeup on you and, with a little luck, score a name/number/address with a little help from google and some databanks I have access to.
I think the most practical suggestion is not to draw attention to yourself. Bitch and moan about people knowing when you're posting a message, will only pirk people's interest.
At the end of the day, you are only as private as YOU make yourself. Change your nick to Anonymous89127, leave all the fields in your profile blank, use vague references about yourself or your life's experience and age, even avoid using pronouns that might reveal your gender. If all you do is come on here and asked direct and simple questions about mIRC, you have no reason to be so skiddish.
Watching you post a message is like watching some random person dropping a letter in a mailbox. No, more private/anonymous than that even!
- Raccoon