Metro, I think it's OK to give advice when it's needed. Timing and tone of voice can often be taken as criticism, so I try to pick a suitable time. Often after the race or when the pace is easy enough, probably after the race for you, I will ride up beside people and offer friendly suggestions or point out the dangers of what has been done. I rarely get told to shut up or mind my own business when I do this. I have been known to yell at times, but usually apologise as soon as I can and explain my reaction. So far, in 44 years, I've managed to avoid being hit!!!

Give advice when you think it's appropriate and remember to smile while you do.