My basement ceiling\ground floor has a "truss" system. How to hang things?
Truss systems like that have "strongbacks" at intervals--vertically oriented 2x6 lumber that ties the trusses together and shares load among them. For anything under about 500 lbs. I have no concerns except one:

If you suspend a heavy object at a point along the bottom chord that falls in the center of the gap between web connections, the bottom chord could sag over time. This could result in a bulge in the ceiling, but certainly won't damage the truss system. To avoid this, either be sure to hang from at or near the webbing connection, or spread the load to limit weight at each point to around 100 lbs.