You might be in trouble in New Jersey
As a follow on to 6726's excellent answer, some states even have statutes that require many consumer contracts to be clear and understandable. For example, New Jersey law requires consumer contracts to be "easily readable." NJ courts have repeatedly used this statute to refuse to enforce confusing contracts.
Here is the statute, including the two "examples of guidelines” it provides of the sorts of problems courts and others “may consider” when determining whether a contract violates the Act.
56:12-2. Contracts to be written in simple, clear, understandable and easily readable way
A consumer contract...shall be written in a simple, clear, understandable and easily readable way. In determining whether a consumer contract has been written in a simple, clear, understandable and easily readable way as a whole, a court, the Attorney General or the Commissioner of Insurance…shall take into consideration the guidelines [listed below]. Use of technical terms or words of art shall not in and of itself be a violation of this act.
(1) Cross references that are confusing;
(2) Sentences that are of greater length than necessary;
(3) Sentences that contain double negatives and exceptions to exceptions;
(4) Sentences and sections that are in a confusing or illogical order;
(5) The use of words with obsolete meanings or words that differ in their legal meaning from their common ordinary meaning;
(6) Frequent use of Old English and Middle English words and Latin and French phrases....
(1) Sections shall be logically divided and captioned;
(2) A table of contents or alphabetical index shall be used for all contracts with more than 3,000 words;
(3) Conditions and exceptions to the main promise of the agreement shall be given equal prominence with the main promise, and shall be in at least 10 point type.