As above. The red is a non-tech trail with some great bits for fast pedally stuff, but if you go there on a weekend you expect to see families out and about.
Besides which trail etiquette suggests that the person in front has priority. If they want to slow/stop/let you past, that’s up to them. The thought of screaming up behind a family out to get a bit of fun and experience and then behaving like a nobber ‘cos they hold you up is so alien to the whole reason I go riding in the first place.
My point is, don’t ever go to a trail centre ready to apologise to anybody because they’ve been inconvenienced by you or your children. If you worry about what others think you will do one of two things. You will put your kids off from riding where there are other people for fear of spoiling someone else’s day, or subconsciously endorse the ethos that it’s OK for more experienced riders to act like tossers.