"The First Amendment protects freedom of speech, but it doesn’t necessarily protect freedom of attention." Are you suggesting that people's free will is so easily lost that we needed to have, in the First Amendment, a clause stating "freedom from external thought influences"? "Modern Media is a DoS Attack on Your Free Will" Only if you allow it to be, just like with any other compulsive activity, if it starts affecti…
Replace "life" with "server" and that also rings true for a network DoS attack. Just as you don't always have complete control over the network, you don't always have complete control over the aspects of your life that influence your day-to-day decisions.
Free will IMO is an abstract and poorly defined concept. You can define free will in terms that make "non-free will" an impossibility. On the other hand, you could also amount it to very basic particle events that are either entirely deterministic or based on seemingly random quantum wave collapses.
If something is regulated by the government, one could argue that you are still able to employ your free will and break the law. Someone may force you to do something, but by a not entirely unreasonable definition of free will it is your choice to comply or not, regardless of the consequences.
Of course, the argument that "modern media is a DoS attack on free will" employs a different, less generous definition. Whether you agree with that definition or not, the discussion on how easily manipulable people are and how external agents exploit that to influence our day-to-day decisions in subtle, often negative ways is warranted. You can call it "[...] is a DoS attack on our subconscious", "[...] on our attention" or whatever, but I think it amounts to the same discussion.
I feel a sense of agency and that I have the power to ignore many of these influences, but this also presents a cognitive load problem. I wouldn't be sad for a second if for example building regulations were used to a greater extent to limit advertising in public spaces.
You also have to consider those that aren't old enough to go to war or to vote, not to make it a blanket "think of the children" argument, but because we recognize that they are not competent enough to make informed life choices. I wouldn't want my children grow up with a poor self image just because it makes them more inclined to purchase bikinis, watches, tanning lotion and cars, but I also wouldn't want to shelter my children from society when it is ultimately our responsibility as adults to shape it for the coming generations. People have made decisions that make society what it is today, and we should continue making decisions and re-evaluating the old ones.
For public advertisement, I've always been in favor of defacing and removing it. I'm old enough to go to war and infringe on the ultimate human right by killing people, so why should I not be able to make choices that improve public spaces? If I remove an online casino billboard, who is better off and who is worse off?