Our backyard zipline has become neighborhood entertainment

Built one with 2x6s and steel cable last summer when my kids were 11 and 13. Figured they'd be into it for like 2 weeks. Instead now there's literally a line of neighborhood kids waiting to go on it every afternoon. It's kind of amazing tbh but also mildly stressful because I keep picturing a lawsuit. We made them all sign a waiver (lol) but is this normal? Anyone else have backyard "attractions" that got out of hand?