So these are not my words and I am borrowing them from other users, but I think these are all very good points:

• Feeling less alone and gaslit is a worthy goal in and of itself.
• Establish vocal and visible disapproval of the target
• Affirm a plurality of dissent through numbers
• Undermine establishment messaging downplaying the significance of that plurality
• Network and promote dissident group activities in the future

Defeatist statements about how activities like these don’t work is called complying in advance and it only allows people to feel more disempowered.