pull down to refresh

I'd imagine removing trust allows the territory to show posts purely ranked by number of sats zapped.
Since 30% of a zap goes to the community pool, it would be expensive for a poster to self-zap in order to reach the top of such a feed.
The question is, would it be expensive enough to stop self-zappers from dominating the rankings when the rankings are solely based on number of sats zapped?