Once scammers have obtained the information about your public address, nothing can prevent them from sending you whatever they want. Just do not touch unknown tokens, never try to sell them, swap them or send them. You will likely be scammed executing a malicious smart contract if you try to interact with these malicious coins. If you are worried about scammers spamming your address, you can create a new one that scammers will have a hard time finding out about. Share your new address with those only who you fully trust that they won't scam you. Although that won't completely protect you from spam, it at least temporarily minimizes its amount. Another solution would be to stop using a hotbed of scammers such as Ethereum for good and focus on less "smart" cryptocurrencies such as Bitcoin, which don't allow for sophisticated ways of scamming users through complexities of turing-complete languages.