Very interesting post. I did a quick search and did not find any reference for fluoroquinolone decreasing testosterone, but that does not mean that it doesn't happen. Quinolones definitely have side effects: Peripheral Neuropathy Associated With Fluoroquinolone Antibiotics http://www.ImmuneSupport.com/library/showarticle.cfm?ID=3182.
Antibiotics clearly do sometimes damage our bodies natural defenses.
Someday, we will look back on antibiotics as a barbaric form of treatment.
As to prostatitis and epididymitis being viral, that's definitely possible, but more research needs to be done to sort out the cause of both.