My definition of wisdom is the ability to responsibly use intelligence, and while as a species we are blessed with an amazing amount of intelligence, our wisdom has not advanced accordingly. The phrase that with great power comes great responsibility is not something that is taken very seriously where it counts, not even (or especially?) in high level global politics and with all our technology, it seems that our actions are mainly determined by the same limited animal psychology that determined how cavemen behaved. It's just that now the stakes are much higher, and junk mail from AI is the least of those problems.
The "upside" is that nature eventually takes care of things when they go out of equilibrium, so there might be a forest fire on the horizon to restore it. In the case of AI spam, it might cause people to automatically filter their incoming mail from any content that even implicitly tries to sell something, or even any email arriving from an address that is not on their whitelist. This might eventually cause people to need to actually physically meet (gasp!) in order to add each other to their whitelist.
The "upside" is that nature eventually takes care of things when they go out of equilibrium, so there might be a forest fire on the horizon to restore it. In the case of AI spam, it might cause people to automatically filter their incoming mail from any content that even implicitly tries to sell something, or even any email arriving from an address that is not on their whitelist. This might eventually cause people to need to actually physically meet (gasp!) in order to add each other to their whitelist.