I don't have tiktok but according to anecdotal evidence from family members who do, the propaganda you describe seemed to be people doing stupid things in their bathroom while getting hurt in the process.
You'd probably say 'potential' but just think about it, banning something for 'potential'. Is that where we are right now?
The problem is they could pull a Facebook and show certain content to change peoples moods intentionally. It's already proven possible. That said, I'm all for legislation against all social media companies.
Changing their mood would be one thing, though I doubt it'd work on TikTok as well as it might on FB, people go to TikTok for specific types of content. Propaganda would be quite another, TikTok's format doesn't seem to really work for that kind of content, it's short videos, not infographics and texts.
You'd probably say 'potential' but just think about it, banning something for 'potential'. Is that where we are right now?