I have only been to one JW funeral.
There was a sprinkling of non-JWs in attendance; neighbours of the deceased etc. They were easy to spot because they came dressed “smart casual” whereas JWs came dressed like that were attending the board meeting. I felt the urge to try to tell some of them, that I was one of them, but the opportunity didn’t arise. (I’ve never been a JW, but I was also dressed like it was a board meeting.)
The talk was by an elder who knew the deceased, and did talk a little about the deceased, including a few antidotes that I knew to be true. But of course Borg theology had to come into it.
During the talk, I could not help but wonder what the non-JWs would be thinking. The whole thing was rather formal and unemotional; which is weird for a funeral, especially as the deceased was not that old. Outsiders would not have realised that the person giving the talk was an elder.
The elder brought some biblical quotes into a funeral talk, which is not unusual in itself. The quote snippets he used flipping back and forth might have seen odd to someone paying attention. He emphasised Ephesians 9:5 (I think it was that one) which is an odd one to mention at a funeral, about the dead knowing nothing. I know how it fits with JW theology, but it wasn’t explained, and an outsider probably would have thought the speaker had lost his place and accidentally left something out.
Then late in the talk, the elder said something like, “and [the deceased’s] biggest regret would have been that he did not see Armageddon.” I think at that very instant, all non-JWs in the audience would have realised they were surrounded by a bunch of crazies.