We are witnessing now all these erc20 scams. I actually participated in a couple airdrops cause i thought well i join a couple for fun and actually gained some. But its not right to be part of a scam and make money out of thin air i figured.
I don't know about the other "airdrop" things thats spreading here but the true airdrop I know is when a certain coin forks just like what happened on bitcoin whereas users received BCH and BTG's from just owning bitcoins before the specified block
With that said, if crypto becomes massive. What stops people to make all kinds of shitcoins and see like 100.000 shitcoins on cmc if not more.
Bitcoin is not that different from our money [
cash; can hold physically] and just like it, even if the governments set tons of laws no one can stop someone if he wants to scam his people as we have our own will. In conclusion to that, No one can stop people from scamming one another but we can definitely prevent them from taking the fraudelent baits.
Another thing:
would it be likely we see all businesses have their own coin? Amazoncoin? Walmartcoin? (i use these since these are internationally most known. Not an American..)
Most of them are not very fond of cryptocurrencies as of now but things can change in the next few years depending on what will happen so theres still chance.