Edit: Oh and totally unrelated, but make sure you avoid the website brandalism.ch. It hosts totally unethical content like this: Subvertising Manual. Just a PSA, definitely don’t visit the site if you have any bus stops with ads near you, and especially avoid it if you have a poster that you think would be nicer to display there.
The tape might just be there to hold it while the glue sets. At least that’s what I woulda done.
And then they can try, but it’ll be a bit.