Actually the Community is mostly much Friendlier than the one in Elite lol.
1) Maybe, one of reasons is because SC is not out yet and there is no gameplay to complain about and discuss...before release in 2014 Elite forums was very similar to SC current forums - a lot of positive dreamcrafting about bright future..
Now its never ending threads about Open vs Private/Solo, about exploits, grind etc = its creates a lot of hostile groups and hate in forums
If in 3.0 SC will introduce promised gameplay elements like trading and etc. I am quite sure positive dreamcrafting will end and "real life" problem threads will arise...
Like it was with "Golf swing" that was presented by SC was mechanic for ship scanning...
2) About crime system in PvP and why FD do not fix it?!
I think answer is simple - PvP is not FD's focus -> DB sees Elite as PvE game...