Another option might be that, after an account has been reported a given number of times, any further content from it is temporarily quarantined, allowing some level of moderator to check the account before approving queued and further posts. (Quarantine could also be combined with some of OP's suggested triggers.) Quarantine has pros and cons as well, but it's another option to consider.
The actor is engaging young audiences again with “Sound Detectives,” a comic mystery podcast that teaches the art of listening. [...] a new podcast for audiences of elementary-school age that is part whodunit, part science exploration and part comic adventure.
Link to podcast. It'll be ten episodes long. The first episode came out Wednesday, with a new one each week until early next year.
“Sound Detectives” visits places like Yellowstone National Park, the NASA Jet Propulsion Laboratory and the streets of Bangalore (now Bengaluru), India. When creating the missing-sound mystery for each half-hour episode, Smith and Sokolowski said in a video interview that they sometimes started with a site they found intriguing, and at other times with a sound. The sounds they chose can be challenging to identify; one example was recorded on Mars.
Does anyone know if phenylephrine is otherwise harmless? If it's essentially harmless, and assuming all these various products have other ingredients that remain effective, then it seems to me that the easiest thing for the companies to do is to move phenylephrine from the "active ingredients" section to the "inactive ingredients" section.