I tend to agree with the sentiment with apostates who hang-out in convention parking lots yelling at JW's or crashing memorial does nothing. But I think it only strengthens the JW's and their resolve.
If someone is having doubts and wanting to leave the ''truth'', the best way is read apostate sites, books and videos. I think that people should seek out apostates quietly and under the radar and fade, if possible. Instead of apostates yelling at people in arena parking lots, I believe it has an adverse affect on them(the apostates)