If he crowds the plate, he should expect to get hit and take it like Don Baylor. It's not against the rules to pitch inside, and if you are going for the inside corner, you are better off missing inside than out over the plate. Or he can learn to hit the up and in ball better so pitchers will attack somewhere else.
Also, even if the Brewers don't go after him, William should pound the glove behind Wilson's head every pitch.