You can try to avoid service, but there are other ways you can be served. Let's face it, if it were that easy, no one would ever be sued....
Mailed service without a signed return receipt is not enough (just remember not to refuse it, that counts as service). And if you dont answer your door, you cannot be served...just say you were away at the time of attempt. If neither is accomplished, you can get any Default Judgment vacated.