Ask HN: Can you help me with this technical policy?

I am currently working on a small blog built with Flask and Python (community size under 10k). To manage spam, I am considering adopting a policy similar to Hacker News by not allowing users to delete their submissions after a specific period. This approach obviously has pros and cons. However, in the age of AI-generated spam and content scraping by LLM-based tools, freezing submissions might be an effective way to combat content theft. What do you think of this content freeze policy?