Good points Simon and depressedsoul.
I would tend to agree that forcing information on someone is unlikely to change their mind - it's a bit like someone ramming a poster in your face as you leave an assembly.
I think that there a number of positives however, especially when the hotspot is set up by someone not known as an apostate.
1 - it clearly says "there is a dissenter here". If there was more than one hotspot at the same time then it adds some weight
2 - simply using jwfacts.com (or variant) is a clear pointer to perhaps the best site on the net for clear information about Jehovah's Witnesses. I don't think anyone is going to jump to jwfacts in the middle of session but those already feeling unsure about things may get some inspiration to click on that link later
3 - it's a beacon to others who maybe lurking on sites like these that there is a fellow objector close by. I would be bowled over if I knew there was one or two others at the CA who were mentally with me
4 - it does not cause a scene that just reinforces the stereotype of the embittered apostate
5 - you can participate from below the radar. Just enabling the link last weekend gave me nervous buzz that I had not experienced since first clicking on the link to JWN. I felt I was doing a little something, doing more than just sitting in my own little bubble of awareness
6 - it's fairly low risk. I think if it happens a lot then the org may come up with some strategy to try and work out who it is or deal with it in some other way but they cannot search anyone so if you are careful there is very little chance of getting caught
7 - it does make the attendants scurry around wondering who it is. A bit childish really but I was very entertained watching the reaction when I did it.
So, as a tool to wake someone up then on it's own it's probably not going to set the world alight but I like it nonetheless.
Imagine what message it would send if, for example, every person who has mentally woken up set up a hotspot called "I don't believe this anymore" and turned it on all at the same time. If you saw even 10 hotspots within your range then it would be fantastic.