A major problem with any endfed wire antenna, random or not, is that the tuner used needs a very good ground, either as a big radial system or a very good cold water pipe or series of ground stakes. Some convenient palm trees near a hydrant just Mauka of Kennedy Theater was an ideal setup. I used my antenna launching kit consisting of an underarm throw weight, and a small slingshot to put the string up and over the exact center of a palm tree in relatively few tries. It is important to put the string right over the center of the tuft of fonds on the top of the tree to get any real support. The building in the background houses the computer center.
Nothing is perfect.
But hash from the computers on 40 meters does not seem to be a problem. Most of the clocks are screaming away above 6 meters now days, or even 220 Mhz. A modified gluing clamp was used for the fire hydrant connection, the type that is like a huge metal clothes pin. The plastic tip protectors were removed and the tips bent so they were parallel. Then a heavy wire was attached to both jaws of the clamp for maximum contact area.