Several assaults are said to have occurred during the trial period. Even Katharina Wagner, the director of the most important German opera festival, is said to be affected.
Acting and dedicated music theater, which is not limited to the static singing of arias on the ramp, are physical art forms. As soon as two or more people are on stage together, there is interaction, closeness, maybe touching and physical familiarity. In this context, the probability that the protagonists will even get too close to each other should be a lot higher than in a traditional office job.