[agumonkey]

For a reason I can't reply to you brk but I used the same ideas.

My last question was about communicating openly or not about it.

    - Openly would make robber aware and probably come up with attacks 
      or blocking means, but that would surely render their activities 
      a lot more complicated. Could be mass-produced.

    - Secretly a few people would have it and use it as bait, and 
      authorities being aware of the scheme would casually catch robbers 
      later. No mass-production

Oh one more thing, I was thinking about using a cellular module with custom firmware to reply to text messages with gps position but I'm not sure it's feasible.

[pavel_lishin]

Sometimes I don't see a reply link on certain comments; clicking on the direct link for those comments, though, shows me the "reply" button.

[agumonkey]

I tried that, without success. It's probably a karma related behavior

[Dove]

Actually, it's time-related and everyone sees it. Deeper comment threads have a timer that prevents comments for several minutes. It's to give people arguing with each other time to cool off.

[agumonkey]

Are those rules written somewhere ? I like the tree pruning effect of this one

[Dove]

http://ycombinator.com/newsfaq.html has some of them, but not nearly all of them.

[maxerickson]

The cellular+GPS is a commercial product:

http://www.spybike-gps.com/products-gps-localization/top-cap...