The more personal messengers there are, the more they are all garaunteed to fail and collapse. Stick with pushing Signal into tue collective public zeitgeist, and once strangers on the street ask if you are on Signa, then we can consider other options.
Focus on dethroning Whatsapp and shut up about a messenger that 50 people out of 8 billion people have heard of before.
Not if they can’t provide evidence of physical violence. Negative comments and mockery does not rise to the level of orders for being hunted for execution like some opposing political people or religious people had their families killed for not bowing to government system and surviving members had to flee country before they end up dead like their family.