Quite the opposite.

Proof of work prevents the spammers and scammers.

That's why the #Bitcoin network (or world wide computer system - biggest ever) is unbroken in 15 years.

You should read Jason Lowrey's book, Soft War. It's not an easy concept to internalized. I am on my 3rd read through the book. I think the book will have historical value at some point.

I stop in the book when I question something. I research it from other perspectives/views. I have hit some dead ends with Jason where he was 'reaching' but for the most part the general thesis is sound.

From a cellular perspective, a cell eating another cell must have a gain in energy or the 'attack' would collapse life. Proof of work. The cells that do attack other cells without a net energy gain, die - this keeps life progressing with ever more complexity.

Bitcoin brings this same theory to money - or exchange of work/energy between humans. At this point, bitcoin is the purist form of value between humans the world has ever seen.

Proof of work guarantees the strongest miners 'win' increasing the security and scope of the network - driving humanity to the next level. The Bitcoin network is growing like it's an organism evolving in nature - which is why it's following PowerLaws and other naturally occuring physics concepts.

Back to your point, this type of system will stomp out the scammers that are NOT adding true value, either in mining, or through humanitarian benefit in the exchange of Bitcoin for fiat or Bitcoin for someone elses work. Spammers HATE proof of work! 😇