This may have been addressed before but I need to vent. First of all, yesterday I was in one of the airport lounges and it never fails, there is always one person that is so loud, oblivious to everyone else. Either they are talking on the phone or directly to one of their companions. Other people are trying to relax or maybe do some work and they are all you can hear.
Next, waiting for my connecting flight someone was watching something on their phone with audio and no headphones, full blast. I gave her a glance, but again she was oblivious.
Lastly, after boarding a guy walked on the plane talking on the phone. He was making million dollar transactions, moving money all over the place. I was very impressed. Funny, he was sitting in coach. How do I know what he was talking about, despite the fact he was sitting about 5 rows behind me? He was speaking so loud most of the plane could hear him. He continued to talk until the flight attendant insisted he hang up for takeoff.
I have 2 questions. I feel that common courtesy is disappearing, am I being too judgmental? Also, does anyone address these people and point out what they are doing and how do you do it?

I searched and couldn�t find anything, at least recently.

This is why I�m always walking around with headphones on. It�s not just at airports - it�s everywhere now. The no headphones when listening to music, watching videos, playing games, etc is incredibly annoying. Ear buds can be had for as little as a dollar. That being said, I try to avoid confrontation and make as minimal contact with people as possible. Hoodie up, sunglasses on, headphones jammed into my ear canal.

It’s amazing how often it happens. I try my best to be discreet when on the phone in the SkyClub or if I have a call before takeoff.

I understand that there really aren't any rules/standards (beyond basic courtesy which is surely lacking) in the "public" areas of airports such as the gatehouse, but it would be a big improvement is SC agents would simply enforce some rules. There's no excuse for a loud cellphone or (worse as you hear both sides of the "conversation") Skype conversation in a quiet zone (nor for walking a screaming baby there) and anyone who is playing a video at full volume laced with expletives in a lounge should be immediately ejected. Then there was the time someone behind me was watching a birthday party (of course with repeated attempts at drunken and off-key singing of the happy birthday to you song) video (of course without headphones) on board during the safety announcements so that at least several rows in front and behind the offender could not hear a word of the emergency information.

Some parents seem to think that having kids gives them a free pass to encourage (yes, I said encourage, not just tolerate) their offspring to run and scream in airports and on airplanes, with the parents sometimes joining in the fun to demonstrate to their children that consideration of others neither expected nor necessary. Could it be that conception or childbirth makes one (at least selectively) deaf or are parents just so accustomed to the shouts of their children that they're oblivious? If kids behave 24/7 the way some of them do in airports and on airplanes, I can't imagine how anyone can stand it. This seems to be the opposite of evolution predicting that parents are especially attuned to the cries of their own offspring.