This is just my opinion. 

I think the most respectful fandom in Kpop is Starlights or VIXX fans. I rarely see any bad stories or incidents with them except a couple. Starlights are so kind and respectful. Whenever the group walks by in the airport, the fans just step aside like the Red Sea haha. When the members have individual schedules, Starlights would always gather up and meet them whether it's a drama, a musical, etc. The relationship between VIXX and Starlights is like no other. If you see their concerts, it's really heartwarming! They make each other so happy. And VIXX lightsticks at concert spices it up. VIXX can go up to fans so easily it's amazing. The members would also go into the audience area so comfortably, and interact with fans, it's unbelievable. 

The boys would always give the fans gifts and vice versa. There was even a time when one of the fans made Leo, one of the members, a lunch and gave it to him. Even VIXX's manager named Starlights one of the most respectful fandoms in Kpop. There has never been any Saseang stories except two that I know of. I think part of this is because VIXX is not very popular, but I honestly hope they get more attention. VIXX is a very talented group that deserves more love. Anyway, I hope some fans can learn from Starlights and follow them on how to love your idols and respect them! I definitely learned a lot from them. I'm a HUGE Starlight haha! Please love VIXX! Starlights&VIXX Forever!