A German guy did something similar with the "Parallel Live Simulator" app [0] and got free stuff from shops by pretending to be an influencer. [1]

It was funny, sad and scary at the same time.

0 - https://play.google.com/store/apps/details?id=com.bigbrain.p...

1 - https://www.youtube.com/watch?v=9otwVwVCxSc

edit: typos