Yeah - it's helpful to make public commitments about charitable giving if, e.g. you have a blog where you have enough space to explain the philosophical underpinnings of your need to publicly broadcast how much money you're giving away. Without that context, it can look like you're bragging about how much money you have.

We spend a lot of time agonizing over how much to tell "normal" people about what we're doing and the cost of being "weird". This isn't so much of a factor if you live in a nice EA hub like Oxford-Boston-San Francisco, but for those of us that don't....we're stuck with the internet.