Thanks, Angharad for the question.
How the WTS has perverted the "shepherding" of the flock. Here we have a question that highlights that the flock have the view that elders' shepherding calls are visits by the spiritual policemen.
No matter how they try to gloss this over, this is a general view by the R&F. Elders may try to deny it to themselves, but how they must be embarrassed by comments such as yours.
The answer to your friend's question is No, you cannot have judicial action taken against you for refusing to welcome the elders at your home.
However, (don't we love that Watch Tower idiom?) there is the "crime" of rebellion (included in apostasy) which may also be covered by the the "crime" of loose conduct. Yes, it sounds incredible, but as "the green book' says: "Term not restricted to sexual immorality".
In addition, there is this comment on page 99 of "Pay Attention to Yourselves" (ks91) [the elders' green book]:
"If individuals persis in 'walking disorderly' in serious violation of well-established Bible principles, but not yet to a degree warranting judicial action, they may be 'marked' by members of the congregation."
Either of the above two actions could be taken by over-zealous and one-eyed bodies if they so chose.
It's a great legal system, ain't it? Notice I didn't say "Christian".
Cheers,
Ozzie (of the non legal eagles class)