Outrageous terms such as these, or the famous google chrome one or several ones in your microsoft software, discreet paying you to rat out illegal use of their software back when they owned 3dsmax, etc. It's all common and no one really cares if you break them. Its easy to write a rule, but a lot of the most outrageous claims cant even be forced by law.
You see this especially often with trademarks or liability agreements. Some businesses try to write off any liability in their agreements but if there is a law that says they are responsible for cetain things, you can still sue them and their license wont mean a thing. Rules are nice as long as they dont cross the laws :-) the rest is mostly bluf, because often times, bluf works :-)

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