A little bit of most of the items listed except for *cheat (unless you mean cheating on your real age- AKA ride a bit like you are younger than you are due to your higher fitness level). Otherwise it is just not worth cheating, as you are only cheating yourself and compromising honesty. I also do not see any advantage to not ride with someone younger. Even if you get dropped or whatever, just go ride as long as you can with the young group if it meets your training plan for the day.