Recently I was told of one officer, in a state far away from me, who was posting photos of himself with his arrestees. You have got to be kidding me. Again, privacy and legal issues are lurking here for that officer (provided he is still employed) and his department.
Old school lesson: Don't brag; stick to your business.
Integrity is a word we use a lot in law enforcement. I was having lunch with an academy director regarding a cheating scandal they were dealing with. One part was the students had their Internet-capable phones in the classroom with them while testing. There are allegations of texting answers back and forth. Another allegation was that one student was looking at notes on his or her phone in a file. All denied cheating, but there was a cloud over that class and their early careers. I'm wondering, why are they allowed devices in the classroom or during testing? Where was the proctor?
Old school lesson: Study and preparation is hard work. Do it right and the knowledge stays with you.
I have seen hundreds, make that thousands, of young officers in my career. My biggest advice to you is that you do not have to seek trouble; it can seek you out. If your pals encourage you to do something because it is cool, nicky neat, or whatever, ask yourself a few questions before you engage in the frivolity.