Well I enjoy watching a good 3-d flyer, but do have a problem when it's right over the runway.

#2 Saftey issues concerning 3D IMO are usually invalid. If I am hovering over the runway and lose it or have something fail its just going to plop down onto the ground and not go to far.

Yes this is what will usually happen, but what if you have a glitch and the throttle goes full open for a few seconds?? The plane isn't going to just plop down right there. The field that I flew at had a few that flew 3-d and when they were ready to go up we gave them the space and just popped a cold coke and watched. It sure isn't going to hurt anyone to lose 15 minutes of flying time. We did have one guy get his plane ready (33%) to fly while I was flying and he came over and told me to land so he could fly, well what I told him can't be repeated here, but some courtesy both ways can go a long way. Just my 2 cents worth.