If I if enough hypothetical if's that's just a giant empty if, right?

It'd be useful if commenters view this from the pragmatic real world track maintainance PoV.

Verifiable calls from the public about blocked lines made to official numbers with traceback etc. carry more weight than social media buzz.

In urban rail the bulk of AI generated images can be discounted via camera feeds and sensors (eg: there's no indication of a line break so that image is BS).

There are already procedures to sift prank calls from things that need checking, to catch serial offenders and numbnuts that push bricks from overpasses.

In the specific instance of you hypothetically "just me showcasing my art, no harm intended" .. in a UK jurisdiction that would fall to the estimation of the opinion held by a man on the Clapham omnibus as channeled by a world weary judge with an arse sore from decades of having such stories paraded before them by indolent smirking cocksures.

YMMV.