how many fouls is too many?

[grunewar]

Sometimes games can be a train wreck. As officials, you call what you see. The players should adjust to how you call the game - that is, if they want to continue to play in the game. If the D is too tight and players continue to press, play D right up against the offense, or continue to trap and reach, etc., there may be problems.

I did a GV game a few yrs back where one team was in the bonus ~ 4:00 into the the 1st qtr. It happens.

That being said, there's nothing wrong with asking yourself the question. Every game is a live and learn opportunity. Would you do anything different if you could?