China’s Ministry of Public Security warned celebrity-stalking fans to behave in a “rational and civilized” manner or face consequences after a large crowd waiting to greet several Chinese stars damaged public property at Shanghai’s Hongqiao Airport.

In a statement Sunday, the ministry reminded would-be rabble-rousers that disturbing public order is punishable by administrative detention, fines, or even criminal prosecution.

The previous day, hundreds of fans had gathered hoping to catch glimpses of big-name celebrities at the airport, resulting in chaos and property damage, according to photos shared on social media. A list circulating online had leaked the names of 16 celebrities who were supposedly arriving at and departing from Shanghai that day, without specifying which transport hub they would be using.

Tracking and broadcasting celebrities’ every move on social media has become a controversial trend in China, where some people go as far as selling celebrities’ flight details. In other cases, die-hard fans have purchased plane tickets and checked in for flights just sidle up to their idols, snap a photo, and then cancel the fare at the last minute. To combat this phenomenon, Korean Air announced in December that it would raise its refund fee for late cancellations. (Image: @新闻晨报 on Weibo)