I've worked in IT for a long time, I can't count the number of times I've seen scams that start off with "Just send your bank account number, and..."
So when I see posts in this newbie forum that tell me to post my wallet address for a chance to win something, I get really suspicious. Is it safe, or can posting my wallet address an easy way to give someone a back door to screw with me?
It is safe
Always use unique BTC address for everything, so you cant be tracked easily