Subvertising

Subvertising, a portmanteau of 'subvert' and 'advertising', is a subset of Culture Jamming in which corporate logos (and/or slogans) are altered in ways which alter the meaning, in order to make a statement.

How To Subvertise

Obtaining High Resolution Corporate Logos

It helps if you have a high-quality vector version of the logo you want to spoof. If you cannot obtain a file on the Net, scan one in and trace it in a program like Illustrator.

Subvertising Examples

Adbusters Corporate Flag

Flickr Subvertising Photo Pool