You should. Earlier I used to believe that one shouldn't really market/talk out loud about his/her charity. But of late, I have realized that it is important to propagate positive ideas/vibes. If you're involved in a charity, you can always promote in a subtle way so that more and more people get to know about it and contribute in whichever way they can.

In the age of Internet, one really doesn't know where from an idea can take-off and do wonders for the underprivileged section of your society.

Thank you for your comment :)