If you install a piece of software, you click through an agreement. You are party to a contract(-ish thing, to get technical).
Here's my question. Most EULAs include a clause to the effect of "by clicking Agree, you agree to the terms of this license". Suppose I choose not to agree with that clause? Suppose I say to myself, "By clicking Agree, I agree to nothing in particular". Can the software's copyright holder do anything, legally, to prevent my use of the software? It seems to me that they cannot, although I am not well-versed in the intricacies of contract law.