maninblack:
JW funerals are nothing more than infomercials for the religion and I find them to be cold and unfeeling as opposed to other religions.
I would not go to a JW funeral unless I had some connection with the family and especially if there are other non-JW family there. I would sit with them and ignore the JWs. I have no need of their attention.
As others may have said, you might prefer to send a card. This way your sentiments are seen. You also might be pleasantly surprised and get a small acknowledgment card back from the family. It has happened to me.
I can appreciate your observation about them trying to pretend you don't exist. The fact that they do this means that they are perfectly aware that you are there! I have seen this behavior and laugh to myself because these people weren't my friends 30 years ago. They are a joke, really.