It's just my opinion, and if you feel you must continue going to the Memorial to appease family that doesn't shun you, I fully understand.
Otherwise, going to the Memorial tells some JW's that, deep down, you know they have the truth and want to come back.
If you partake, it sends the message that you are a smart-ass or mentally off- "He thinks he is one of the anointed."
If you protest outside to the likes of Rick Fearon, you feed their persecution complex- "We must have the truth because they protest us."
Not going can send the message that the religion is not for you, it is not disrespectful to not be there, it's just "not for you."
OTWO will not be attending. Nobody has bothered to invite me to the last 3 or 4 Memorials unless you count strangers getting their pioneer time in and leaving an invitation at the door, not knowing that a JW and her husband live here.