Witnessed many of the same stories all have posted about here. Most numerous violations? A little Mary J in system. Feeders getting popped on random. Why? Beats me why someone would jeopardize this for just that.
One that stands out, tho, is sleeper team we had. Both drivers were padding miles. Back then (yeah, I know cuz I was sleeper for 5 years), we had to hand-write in all miles on, what seemed to be, endless reams of paper...paper log books, Penske fuel sheets, Louky run sheets, the works. It was easy to pad but, also, easy to cross-check. WE never did because we weren't that way and we could always make money running legal, anyway.
Company had been doing their OWN cross-checking and found out they'd been doing that for quite some time. Open and shut case. Admitted it. "A" driver blamed on "B" driver. "B" driver blamed on "A" driver. Both been gone now for quite some time.