I think is perfectly acceptable to say that you are a modest person; provided that you are. You are simply being honest. However, I do find the logo to be inappropriate for this group unless some one created this group to be rude.
I think there are many ways in which a person can be modest. A person can be modest in the way they dress and still be fashionable. A person can behave modestly by not bragging and by being selfless. I am not saying that we should allow others to take advange of our kindness and generocity. We all definately need a backbone and established boundaries. But its important to think of others before ourselves. This is one lesson I really hope my kids learn from me. Too many people today are so wrapped up in themselves they seem to borderline on an narcistic personality disorder.
I would like to see people get back to the basics. Stop buying kids "things" and take them to an orchard for the day. Stop telling kids that they are the best at everything. No one is and no one can be. Make children earn their rewards instead of giving away trophies for everything. I think this is they way to get modesty back in our society. But that is just my two cents. I am no sociologist, psychologist, or psychiatrist....I am just a mom.