"Microsoft's behavior has to be looked at through the scope of the contract, not through a copyright infringement view, " said Cullinan.

CNN: Judge reinstates piece of Java injunction against Microsoft

He added that there would be clauses in the Pistorius-Nike contract that make clear when the athlete's behavior can allow the company to cut its ties -- and law-breaking would often be among the reasons.

CNN: Nike's bullet ad with Pistorius backfires

In Laredo, Texas, school officials are considering asking next year's seniors to sign a contract agreeing graduation ceremonies are a privilege that can be revoked for bad behavior, said Veronica Castillon, a spokeswoman for the Laredo Independent School District.

WSJ: Pranks Test High Schools' Patience