I think safety can be a problem no matter how you fly.

3D flyers make me feel unsafe when they hover close to me when I am flying. Sometimes small electrics are in this category as well.

"Pattern" flyers make feel unsafe when they fly fast & low when I am flying.

Other flyers try to push a bad situation when they should just dump the plane.

Some people are not careful when they set up their planes and create a hazard for those in the pit area.