If someone really wants to improve the world
..Then making telemarketing of all kinds (including spam texts) illegal would go a long way towards that, IMO. Or make it too expensive for the fly-by-night scammers to afford doing it, such as a mandatory charge of say, 5 cents a call and extreme penalties for anyone trying to avoid this or violating do not call lists. Making spoofing CLID (caller ID info) illegal would be great too. I know this would be very nearly unenforceable, but a man can dream..
There are few things that irk me more than walking through a cloud of gnats in the summer or getting some idiotic "extended warranty" call with the ID spoofed to look like a local number. And it always happens when you're incredibly busy and/or waiting for an important call. No one ever answers their phones any more and this is why.