New players and those who have never played competitively often have no clue about any of the more "advanced" play styles or etiquette.
Many of those are very well seasoned players. But, they did mention that newer people for example had a different meaning to sniping as an example. And that "game play" (I can't remember what aspect it was we were discussing at the time) has changed over the years.
But, being new, that's why I have been asking a number of questions here and elsewhere, to learn the game and etiquette. But, I've been amazed how some people get angry at my question(s). Anyway, thanks for listening.