Any contract where the other party performs so little seeking of my agreement (none at all really) that no representative talks to me in person or even electronically in an individual capacity, where no one witnesses me put my mark on the paper or hears by verbal assent, is in fact no contract at all. Despite what the courts may say. Should they say otherwise, they're wholly illegitimate.
That any of you have let something else stand as the norm is bizarre and alarming. Contracts require explicit, sought agreement, by their very definition. Nothing can be implied. If their business model relies on implicit agreement because anything else would be too difficult, then they simply shouldn't be allowed to remain in business.
1. By reading the message that referred you to this page ("randomstring.org/~dsr/eula.html") you agree, on behalf of yourself and your employer, to release me from all obligations and waivers arising from any and all NON-NEGOTIATED agreements, licenses, terms-of-service, shrinkwrap, clickwrap, browsewrap, confidentiality, non-disclosure, non-compete and acceptable use policies ("BOGUS AGREEMENTS") that you believe I have entered into with you or your employer, its partners, licensors, agents and assigns, in perpetuity, without prejudice to my ongoing rights and privileges.
2. You further represent that you have the authority to release me from any BOGUS AGREEMENTS on behalf of your employer.
I think there is a big difference between the EULA that comes attached to a product you've already paid for, that represents additional terms to what you had already agreed to when paying, and the T&C of a free service or a subscription, presented before payment.
You can't seriously claim that you have a right to use, say, YouTube without any restriction whatsoever. It is a private service, and you can either use it under the terms and conditions that its private owner establishes, or you can avoid using it at all.
When the rubber meets the road, what the courts say is all that matters.