When Google busted all the interlinked directory networks due to the same owners promoting "bidding directory link farms" they deindexed entire networks of spam directories and took their
PR to ZERO since many of them were artificially moving
PR up by interlinking with their buddies.
So yes, if you make the wrong moves or are interlinked with networks like this, you will certainly see your
PR going negative for gaming Google and working scams.