Robert Soloway, King of Spam and does 20 years in prison is enough?

News from informationweek.com, that Robert Soloway facing more than 20 years in prison due to his spamming activity from 2003-2008.

Spam King Robert Alan Soloway, who owns Newport Internet Marketing Corporation, pleaded guilty on Friday in Seattle's U.S. District Court to mail and e-mail fraud and willful failure to file a tax return.

Soloway could receive up to 20 years in prison and over half a million dollars in fines when he is sentenced on June 20 by U.S. District Judge Marsha J. Pechman. The bulk of Soloway's sentence is likely to come from the mail fraud offense, which is punishable by up to 20 years in prison. E-mail fraud is punishable by up to 5 years in prison. Willful failure to file a tax return is punishable by up to a year in prison

Robert Soloway is consider as one of top 10 spammer in the world, and here is the full list from spamhaus.prg

1 Leo Kuvayev / BadCow, Russian Federation
Russian/American spammer. Does "OEM CD" pirated software spam, copy-cat pharmaceuticals, porn spam, porn payment collection, etc. Spams using virus-created botnets and seems to be involved in virus distribution. Partnered with Vlad - aka "Mr. Green"

2 Alex Blood / Alexander Mosh / AlekseyB / Alex Polyakov, Ukraine
So many Alex & Alexey spamming! Alex Blood tied to Pilot Holding & bbasafehosting.com long ago, then Alex Polyakov posted he owned them. Massive botnet and child-porn spam ring, also pharma, mortgage, and more. May work with Kuvayev and Yambo.

3 HerbalKing, India
Massive affilitiate spam program for snakeoil Body Part Enhancement scams. Also does replica luxury goods, pharma and porn. Spams via botnets, bulletproof hosting offshore and even sometimes uses fast flux hosting.

4 Vincent Chan / yoric.net, Hong Kong
Vincent Chan and his Chinese partners have been sending spam for years. They mainly do pharmacy, and are able to send out huge amounts daily. The use a vast amount of compromised machines, for sending, hosting and proxyhijacking.

5 Nikhil Kumar Pragji / Dark-Mailer, Australia Queensland
Through the Dark-Mailer Windows based proxy-botnet based spamware, this spammer is responsible for and behind a large portion of the world's illegally send spam.

6 Ruslan Ibragimov / send-safe.com, Russia
Stealth spamware creator. One of the larger criminal spamming operations around. Runs a CGI mailer on machines in Russia and uses hijacked open proxies and virus infected PCs to flood the world with spam.

7 Pavka / Artofit, Russia
A Russian gang who have been spamming for years. Started with porn, now into many types of spam, always via hijacked PCs. Part of a large criminal group involving ROKSO spammers Leo Kuvayev & Alex Blood. Also see "Yambo Financials" ROKSO.

8 Russian Business Network, Russian Federation
Among the world's worst spammer, child-pornography, malware, phishing and cybercrime hosting networks. Provides "bulletproof hosting", but is probably involved in the crime too.

9 Yambo Financials, Ukraine
Huge spamhaus tied into distribution and billing for child, animal, and incest-porn, pirated software, and pharmaceuticals. Run their own merchant services (credit-card "collection" sites) set up as a fake "bank."

10 Michael Lindsay / iMedia Networks, United States California
Lindsay's iMedia Networks is a full-fledged spam-hosting operation serving bulletproof hosting at high premiums to well known ROKSO-listed spammers. His customers spam via botnet zombies with spam payloads hosted offshore, tunneled back to his servers.

So what do you think, 20 years in prison? Does it too much or not? Just thinking what is the best solution against email spam.