Yes, it's unfortunately a trend to throw e-scooters into rivers. Unfortunately the government is still not collecting stats about this vandalism. Throwing e-scooters with batteries into rivers is dangerous, because the batteries contain poisonous metals. Unfortunately many people appreciate it when people throw these scooters into the river, because they are "annoyed be them when they are standing in their way on the sidewalk".

Some links:

(2025) 300+ e-scooters recovered from the Spree (river in Berlin) by Spree:publik activist Jan Ebel: https://www.morgenpost.de/bezirke/treptow-koepenick/article4...

(2024) Readers of "Neue Rottweiler Zeitung" mention e-scooters in the Neckar: https://www.nrwz.de/rottweil/e-scooter-laufen-gut-in-rottwei...

(2021) 500+ e-scooters were thrown from the Hohenzollern bridge into the Rhine: https://www.golem.de/news/mikromobilitaet-im-rhein-liegen-hu...

(2021) Dozens of e-scooters in the Main: https://www.fnp.de/frankfurt/chaoten-werfen-scooter-einfach-...