Ninety percent of the largest U.S. companies have procedures in place in case inappropriate or illicit images are discovered in the work place, and 50 percent have had to use these procedures for incidents in the past year, according to a study released Friday. The report, sponsored by software company PixAlert and conducted by research firm Delta Consulting, also found that when businesses pursued an investigation, <A HREF="http://news.zdnet.com/2100-9595_22-5752067.html?tag=zdnn.alert">44 percent of cases resulted in a dismissal</A> from the company.