Fact #1: I’m from Goldenrod City, one of the most industrialized urban areas in Tohjo.
Fact #2: In the 70s, Goldenrod City suffered a major environmental crisis when it was discovered that, due to the factories and industrial shipping lines along its coast, the neighboring Goldenrod Bay contained extremely high amounts of lead that threatened the city’s water supply, as well as its population of fish and water pokémon. Consequently, particularly due to the danger pollution posed towards the resident pokémon, strict laws and regulations were enacted in order to control water quality in not just the bay but also the systems throughout Johto. Nowadays, you would be arrested rather quickly if you were caught throwing anything into Goldenrod’s harbor.
Fact #3: Goldenrod’s harbor is a popular destination for both tourists and locals, and because of this, there are quite a few witnesses there at all hours of the day.
Conclusion: Please inform me when this tea throwing will take place. I would love to watch.
The Pokédex According to Bill 