As it happens, you can unclick the option to download the McAfee security suite. But that option requires you to read the download information first, a step which most people plainly skip. That is why the installation of this hapless piece of software should be an opt-in, rather than an opt-out.
You think Adobe is not ethically sound as they may have once been? I agree, they're incredibly irritating.
Adobe is now mostly a Marketing Firm with a software development department. Normally business have a product for a particular market to sell to and they get Marketing to relay the message to that group in hopes they will buy the product. Adobe seems to have this backwards the past few years. Marketing is dictating what products are to be created, Marketing is then soving down the throats of their existing customers. Try using Creative Cloud. The whole thing is an Adobe Sales and Marketing Kit.
This company shows no restraint, poise, or sophistication. They remind me a drunk fratboy type who just wants to get laid and won't shut up about it. Utterly repugnant organization today.
You all can see this post I created. I have a silent uninstaller and cleanup utility out there to wipe McAfee's Security Scan Plus off of any machine you want to deploy it to.