They feel entitled to share whatever you told them with everyone, even those who didn't ask and others who declare they'd prefer not hear it once they start spilling the beans.
As much as they like chatting, they hate being gossiped about. Observe how people react when you start spilling their secrets, even if they felt entitled to do so.
A small subgroup of Aries who can't be trusted with your intimate secrets feel powerful knowing stuff others don't.
They like hearing bad things about others. They get a sicker pleasure from disseminating bad information. Your secrets will be used against you.
Since their lives are so uninteresting, the few Libras who can't be trusted with your secrets have nothing better to do.
Spreading rumors often exaggerated or false—enlivens their dreary existence. By causing upheaval in others' lives, they can only find a little amount of excitement in their own life.