4th foul

[Clark Kent]

I realize we won't find it anywhere in the manuals but how aware should we be of the player's and their foul situations? Do you take notice when a kid picks up his/her 4th not wanting to give them a cheap 5th? Or do you go about your modus operandi as if that is part of the game and a foul is a foul regardless of how many the kid has?

I assume I will get both answers here so for those who do take note how do you go about it? If the team has a scoreboard that indicates the player's fouls I have been able to take note there, however when there isn't a scoreboard with such features how do you wise sagacious veterans go about knowing?