If TikTok is this good at figuring out your general interests, it can probably figure out your political leanings as well. And tailor your content accordingly, in a way that furthers the interests of China. Whether that be by increasing/decreasing propensity to vote, increasing outrage, planting false narratives, etc.
I (not a kid tho) started using tiktok a few months ago and it was kind of good content mixed with algorithmic crap but what stood out to me was that I was getting an unproportional amount of anti tesla videos.
Like people wiggling parts in the interior and compairing them to their own chinese EV cars like MG. Multiple different accounts.
New Tiktok challenge: pinch the sunset from a hilltop - combination of timestamp and known astronomical reference allows calculation of altitude allowing remarkably detailed topographic map around population centers
New Tiktok challenge: trying on all of my shoes - good proxy for calculating disposable income and thus mapping economic activity
New Tiktok challenge: how many flowers can I find in my backyard - reasonable proxy for determining both long term climate and recent weather activity in an area
New Tiktok challenge: trying on my boyfriend's uniform - estimate number, location, and rank distribution of military units
Nation-state level actors with millions upon millions of videos to analyze should not be underestimated.
New tiktok challenge: seeing how much of the interior of this building I can map
New tiktok challenge: demonstrating my physical fitness level
New tiktok challenge: how many different angles of the presidential motorcade can I film
Yes, China can gain intelligence from other sources like spy satellites. I would likewise describe chinese spy satellites as a potential us national security threat.