&gt; After you sign something, it&#x27;s not important if it&#x27;s reasonable or not: you have to uphold it.<p>This is simply not true.  Trivial examples include a contract without consideration, or an apartment lease with clauses that attempt to restrict rights granted by local law (very common in NYC).  Most non-competes in the state of California are not enforceable as well, even if you agree to it.