The creators of these blockchain networks have used great knowledge to create these technologies and so far they work perfectly, so why not make an effort to improve them so that they can limit only one name for new tokens to avoid fraud?
There is no limit in smart contract to choose any name . now it's just a matter of developer ethics. surely plagiarism or copy cat coin with the intention of deceiving others people or scam peole will also not be listed on websites such as coinmarketcap or listing coin website. but actually the blockchain also provides clear details for the user to make sure of it all. such as contract addresses.