I thought that any bittering herb could be considered an antiseptic or preservative, not just hops.
I have made a couple gruits before and though enjoyable and interesting, I found myself preferring hopped beers over them. The hop-free brews I made lasted for around 3 months with no ill effect.
Yes there are, the whole discussion/argument earlier and in the other thread were about them. But the OP used NOTHING as a preservative, or thought the pepper would act as one, which it didn't.