In some states lying to a process server is against the law,
but avoiding no.
To be honest tho its easier just to accept the documents.
Reason being is that its so easy for a process server to get an order for sub-serve where they can just tape the documents to your door.
Which increases court cost which ends up costing you money.
Also if the server has any proof or a good idea that you did avoid service then that is going to piss off the judge.
Which means he is going to be harder on you.
With the way the legal system is set up these days its better just to take the documents,
smile to the process server,
and hope that things go well for you in court or you can settle your case without court.