ok, i do believe that the firelord plugin (or whatever one makes gold armor fire element) is the cause for banning for two new players. The plugin turns gold boots into fire starters while making the rest of the gold armor make you inflammable. i have tested this out, and it works with ANY gold armor.
this plugin could be used maliciously for griefing (which i know noone really gives a rats ass about UNLESS... ->) and for griefing spawn as the 2 people metioned above had done. This could also cause confusion as, people may not know what is causing the fire, and lead to accidental bans.
EDIT: the people were banned for griefing spawn. (just login)