I recall only one convention where there were picketers. I believe that they were likely apostate, or at least that is the feeling I got. I think I was with an elder's son when we saw them. The elder's son took some tracts they were handing out and walked a few steps aways to a trash can, looked back at them, and with a wide, toothy grin I can still remember, tore them up and threw them into the trash.
I didn't really know what to think. We were always told that apostates were pure evil, that they consciously chose Satan's world over Jehovah's Truth. So I stayed clear of them. And because I was a good JW, I didn't think what the elder's son did was right... in taking the tracts from them in the first place. I don't think I really reacted much to his tearing them up so openly and vehemently. I suppose I was just used to such hypocritically aggressive behavior, although I was not much like that.