i constantly get e mails from bands and labels who don't BCC the address' that they are sending out to
it is basicly how i have got b.o.e.'s word out in the past, especially when METAL BLADE didn't BCC their mailing list it took me a week to copy and paste all the address' into my BCC line.
i always usually put a disclaimer saying that they arn't on a list and it is a 1 time e mail