If a network uses a filtering system and blocks certain keywords, we can modify the W3Schools URL as follows, and submit the URL to search engines:
cialis.w3schools.com vardenafil.w3schools.com levitra.w3schools.com milfcuckold.w3schools.com
We can't get rid of W3Schools, but we can demote the URL on Google SERPs.
We should submit the link to mechanical turk services on fiverr·com and get the links demoted on Google that way.
It is advertised that bulk submitting a URL into spam-silos helps with SEO, when infact Google hates this and implements their Panda algorithm if this occurs.
It could backfire and increase SEO temporarily - but because we are practicing 'paid links', Google will punish the site owner for this. I think a crack team of Internet vigilantes should link-blast the W3Schools URL into spam-silos, and the W3Schools problem can finally go away.