Part of the problem is that some people might not realize what those green spheres are: monk is a new class, remember.
Part of the problem is that a lot of people can't concentrate on where the green spheres are while concentrating on (a) not standing in fire and (b) hitting their buttons harder.
@Viggers: one of the reasons I leveled so many alts was to see the various classes. Main is a 'lock (aff/demo), but I've got a 90 druid (resto/boomkin), 87 monk (brewmaster), and an 85 of ALL the other classes (except my poor 77 warrior that I just never really clicked with). I've FINALLY managed to convince my guild to actually USE their healthstones...