Chicken and Egg
I only half agree with Ken Hagan and most of the other comments here. I have my own domain and corresponding e-mail addresses which i use for 'serious' purposes. There is no way I will give one of those addresses to any person or organisation that I do not trust because of my fear that they will pass it on to a spammer.
I have Hotmail and Yahoo e-mail for 'casual' use and find the yahoo 'Address Guard' disposable e-mail addresses to be an ideal way to protect yourself. I've had to dispose of two of these addresses in the past year. As far as I can figure out, when you order something online and they ask for a contact e-mail, they then pass it on to spammers. I don't complain, I just delete the address and never deal with that organisation again.
I think that anyone who needs to send out large numbers of e-mails or send bulk e-mail should have to operate a paid-for webmail account (or run their own domain and servers), which can be shut down if verified complaints are made to the ISP/operator. To change over to this method would probably be impractical for many legitimate clubs and societies and the ISPs would have to spend money organising it, so it's not going to happen.
Some way is needed to make it 'non-profitable' for the spammers to operate. This would require thought, planning and co-operation between ISPs and web-mail operators (cynical chuckles).
The comment about an 'independent Internet Government' made me laugh because such an organisation would need to be international and trans-national, like the UN (cue long belly laugh).
Let's face it, you're on your own out there and only you can look after yourself. Use disposable e-mail addresses, or multiple webmail accounts and be ruthless about deleting them if they become spam targets.