First of all... there is nothing wrong with you - personally - it's that cult you belong to that is the problem.
Some folks just don't want anything to do with having any 'dialog' with anyone that is in that cult.
"...he has the right to either continue the discussion or say "not interested"..."
Hmmm... I used to be a JW - and know that this does not work. Once you engage a JW in 'dialog'... well, many times it's like trying to sling that fresh-picked bugger off your finger. Almost impossible to get rid of.
"...wanting to erect signs seem to cut off the freedom of speech that America says it prides itelf on..."
You speak like you are not part of America. If you live here - you are. Like it or not.
Erecting 'No Trespassing' signs is the only legal recourse one seems to have that will hold up in court - if violated.
'No Solicitors' signs don't work (yall will claim you're not soliciting).
'Do Not Disturb' signs do not work (yall feel that EVERYONE needs to hear your 'message').
'Day Sleeper' signs do not work (yall may feel like an alarm clock).
If someone wants to call the police to request that yall move on to another neighborhood - yall scream "Religious Freedom!"
Nope... "No Tresspassing" signs are a 'blessing' to any folks whut don't want your door-knocking.
Now... if you want to listen to some of us folks as WE have a discussion with YOU... then stick around. There are some really knowledgeable folks here who will be glad to 'knock on YOUR door' - so to speak. However, I don't think you would welcome their calling on you.