[CAPSMAN] 100000 clients using 1 SSID?

Hello,

I read https://www.reddit.com/r/networking/comments/4nxmpe/max_hosts_per_subnet/ and ask what I can do if more and more clients uses my main SSID, i.e. eduroam and therefore broadcast traffic could become a real problem? So what do those reddits talk about:

Any opinions? What can I do on a CAPSMAN based traffic forwarding" setup?