Interesting, I use the 300MB default maxmempool and have never been harmed by spam. Sounds like FUD to me.
Discussion
It depends on what you find harmful
In this post, Chris Guida outlines why he thinks spam is particularly harmful: https://x.com/cguida6/status/1968117953871720463
I've read this thread. It's predicated on a nonsensical statement from Greg Maxwell: "Demand for cheap highly-replicated perpetual storage is unbounded."
"Cheap" and "unbounded demand" are opposites, lol.
This is fear-mongering about Bitcoin becoming a database. If it's so valuable as a database, and you need to pay for said data storage using Bitcoin, how is that bad for Bitcoin? Sounds bullish to me.