Canonical owns a number of trademarks and these include UBUNTU, KUBUNTU, EDUBUNTU, and XUBUNTU. The trademarks are registered in both word and logo form. Any mark ending with the letters UBUNTU or BUNTU is sufficiently similar to one or more of the trademarks that permission will be needed in order to use it. This policy encompasses all marks, in word and logo form, collectively referred to as “Trademarks”.

Restricted use that requires a trademark license

Permission from us is necessary to use any of the Trademarks under any circumstances other than those specifically permitted above. These include:

• Any commercial use.
• Use on or in relation to a software product that includes or is built on top of a product supplied by us, if there is any commercial intent associated with that product.
• Use in a domain name or URL.
• Use for merchandising purposes, e.g. on t-shirts and the like.
• Use of a name which includes the letters BUNTU in relation to computer hardware or software.
• Services relating to any of the above.

If you wish to have permission for any of the uses above or for any other use which is not specifically referred to in this policy, please contact us and we'll let you know as soon as possible if your proposed use is permissible. [...]

While there may be exceptions, it is very unlikely that we will approve Trademark use in the following cases:

• Use of a Trademark in a company name.
• Use of a Trademark in a domain name which has a commercial intent. The commercial intent can range from promotion of a company or product, to collecting revenue generated by advertising.
• The calling of any software or product by the name UBUNTU (or another related Trademark), unless that software or product is a substantially unmodified Ubuntu product, or properly labelled as a "Remix" as described above.
• Use in combination with any other marks or logos. This include use of a Trademark in a manner that creates a "combined mark," or use that integrates other wording with the Trademark in a way that the public may think of the use as a new mark (for example Club Ubuntu or UbuntuBooks, or in a way that by use of special fonts or presentation with nearby words or images conveys an impression that the two are tied in some way).
• [...]

Pues en el caso extremo en que no sea ilegal minimo deja mal paradas a estas empresas en lo moral.