Is it appropriate to confront a higher rank when they are blatantly disregarding regs?

I was out of the Marine Corps for about two years, when I went to pick up family at the San Deigo air port, A new Marine was at the airport sporting in his Charlie's on his way home from boot camp, but had the most God awful New York grease ball necklace on, I went up to the him and started screaming at him, telling him I was gonna rip that guido off his neck and shove it down his wind pipe. He quickly removed the offending jewelry, and apologized profusely,

Cpl Terry Williams - I used to always correct the messed up ROTC Cadets on my College Campus for not knowing how to where thier uniform and wearing PT's while listening to thier IPOD or walking and talking on a Cell Phone in Uniform, I loved it!!!!!!! I dropped one and made him do push-ups because I had corrected him numerous times, the next time I was going to write him a counceling statement (even though he was outside of my chain of command since he had disregarded regulations and the advice of a veteran and seriving duty qualified soldier) , he tried to "pull rank saying he was a "Cadet geting "E-5 pay" I then said but you are still just a cadet at a college and not duty qualified so until you are duty qualified you are not out ranking me especially when you are doing all inds of jacked up shit in uniform!!!!!"

wow, I did all kinds of jacked up spelling darn my phone!!!!! Usually I am a stickler for grammar and spelling!!!!!

I agree, but I loved to confront and correct out of reg ROTC Cadets on my Campus whom had to go to another College's Campus for ROTC so when on our Campus they were pretty much on their own and unaccountable to nobody. I would catch they w/o headgear/covers and instead wearing (we were in Massachusetts) a Red Sox hat, I told the kid/Cadet to remove it because it is better to be wrong and not have your cover than not have your cover AND be wearing a cover which is out of regs. Kid/Cadet tries to pull Rank, I wouldn't have none of that being a Veteran. I also stopped a number of Cadets for walking a talking/texting on a cell in uniform as well as using IPODS in Uniform.
I explained if you are going to lead me you had better learn the standards sooner than later. I eventually drafted a letter to the ROTC Commander/Instructors at other campus about offending students.