There’s always a risk but considering currently there’s no incentive for ppl to invest their time and sanity, I think you’re fine.

Unless you do stupid things. No one is liable if you do stupid things :)

That alone won’t, but if someone irl suspects they know who you are your silhouette can be used to verify/confirm.

Google collects absolutely everything possible and tries to connect the dots. They have everything posted publicly in their archives along with everything you’ve ever given them in private, and anything others have given them. If you’ve ever used Android with Google services, they have had access to everything about you. For Google, nothing is mundane; nothing goes under their radar.

No

Well it’s tracing so presumably the outline would be very similar to the real outline and you’d be recognisable.