you are absolutely right..the rebuy part sucks...i saw guys that rebuy 10 times but the bad part is that they go all in with shity cards like 3 6 or 5 9 and they bust you with 3 of a kind or str8s and most of all they go all in preflop !!
That's why i like freezout tournaments the most...and a lot of sit'n'go tournaments
Cheers,
W13rd0W