llRegionSayTo  instead  llWhisper

for communications with attachments, like AO HUD, cuffs, e.t.c.
some scripts contains llWhisper(g_iInterfaceChannel, g_sMessage);

why not use llRegionSayTo(g_kWearer, g_iInterfaceChannel, g_sMessage); ?
it allows to send a message to only own attaches, others avatars standing near will not recieve this message.