2.5 - There's no need for a hierarchy. You can have optional matches: if a match doesn't have a tag, include it anyway, yet if it does have a tag and the value

2.5 - There's no need for a hierarchy. You can have optional matches: if a match doesn't have a tag, include it anyway, yet if it does have a tag and the value is not what you want, exclude it. The bigger problem nowadays is with people refusing to add '+' and '-' to their site's search function. 2.3 - When a user is adding tags they should be able to see that something has low matches and get a warning. Autocomplete should also help a lot. 2.1 You need to give more power to users to block people categorically and add reasons, and share their blocklists with their friends. Anyone on a blocklist can be ignored or they can have a big warning placed next to them about what's wrong with them according to your friend. That is what local communities already do. If Facebook will never include that functionality, then fine, but it is possible. Also, if you are a liar (unwittingly or not), you should be directed to other liars just like yourself. 2.7 - You didn't even try. It's about as lazy as saying everything is political. You don't even have to use the word 'art'. You can say 'oil on canvas' etc. You don't have to say 'cartoon' when '2D animation' is also good (you can exclude 'non-fiction' etc.). I find it hard to believe that people are oblivious to loaded language.