Building matrix.org as a decentralised & e2e encrypted comms alternative. The filter bubble problem is particularly relevant for us because it's critical for a

Building matrix.org as a decentralised & e2e encrypted comms alternative. The filter bubble problem is particularly relevant for us because it's critical for an open network to let users filter out abusive content (whether that's spam, stuff they find offensive, or just a topic they don't care about)... but doing that in a way which doesn't result in creating a profiling db or creating bubbles and echo chambers. The problem is one of letting users curate their own filters (including blending in others' filters), whilst keeping the data as privacy protecting as possible. It's a fun problem, but on our medium-term radar.