This page is a demonstration of how a conference like LVEE can use Hubzilla to power their conference website. Hubzilla provides plenty of features perfect for such an event. Some relevant capabilities include:
All content in Hubzilla is access controlled with support for fine-grained permissions. You can make some content public, while other content might be restricted to registered conference members or only the organization board.
Decentralization is a core property of Hubzilla; you could say it's part of Hubzilla's DNA. Organizers and other participants of the conference have the same opportunities to contribute content or for publish content on conference website. This does not mean that spam flooded the website, however. The owner of each Hubzilla hub on the network can use Hubzilla's fine-grained permissions system to control who can publish content on his hub.
It is difficult to explain the how Hubzilla's decentralized network differs from conventional centralized platforms; it must be experienced. You can register on a public hub to try it out, or if you are an experienced Linux user you will find it straightforward to install your own hub. A simpler interactive demonstration can be experienced at https://demo.hubzilla.org/.
If you are a conference attendee, you may register on this LVEE conference demonstration at https://lvee2017.hubzilla.org/register.