Well, I delicately brought up the subject of drum shields at yesterday's rehearsal. To my surprise, he was open to the idea.
Unfortunately, his wife (our singer) recently suffered a serious injury and they've incurred a lot of medical bills and money's tight. I offered to buy it and let him reimburse me from gig money, but he's too proud to go along with that.
I might just order it anyway for myself, under the pretense that I can use it in the studio. It's a thin cover story, though, since I don't have any drums and don't play drums myself. Anyone ever use a drum shield for other purposes, e.g. speaker isolation?