I'm not sure what you are saying there EB, but I don't think proximity is a factor, in orbits proximity is not nearly as significant or dangerous as intersecting orbits and with intersecting orbits proximity is very unlikely except for at the moment when the two objects are at the same place at the same time. All of those other factors are those which make it more or less likely that the orbits of objects will intersect.

If two (or more) items are in orbit and in proximity, the likelihood and certainly the potential energy of a collision would be far less.