Not sure if these are possible, but I gave ChatGPT a try for potential fixes:

Limit posting for new accounts — maybe require a 24-hour waiting period, or only allow replies after reading a certain number of threads or posts. Even a short cooldown would cut down on hit-and-run stuff.
Auto-remove or flag posts that include phrases like “any links?” or “where can I find…” from accounts with under X posts or under X days old.
Force new users through a rules acknowledgment step, especially emphasizing “no link requests.”
Temporary posting bans (automated) for first offenses, just to discourage the behavior without needing mod intervention every time.