I have serious misgivings about arming 13 year olds.
As do I, of course - particularly when the weapons could be taken from them, as undoubtedly would have happened in this case.
The real point was that the kids/thugs doing this were citing Trayvon as an excuse... but against a helpless, defenseless victim as opposed to the victim of Martin's attack. It was was a classic bully attack - except there were three bullies.