re: Poker & Bluffing or Insanity?
In small MTT tournaments with rebuys it is not unusual to see all in play early, good, it raises the pot if they rebuy. They are hoping to catch a good one and save themselves any more rebuys and with a 30% chance they most probably find it is worth the effort.
However the players style you struck with constant raises just tells
you that was most probably how they got their chips, either through striking a win on the river or betting. As you saw they are eventually found out, and presumably you noted them so that next time they will be able to be played appropriately.
The big danger is that occasionally they do have a hand and that is costly.