if(!(h=cursor[classno])) {
In any case, if a hacker was able to get to the point that they could control the vacuum's camera, would it be that hard for them to disable the warning? While the issue remains, it might be wise to disable your vacuum's camera, at least when not in use, with the lowest-tech hack of all: putting tape over it.
，更多细节参见51吃瓜
SpaceX rocket debris crashes into Poland
换句话说，他们不是不知道这样做不对，只是在权衡被抓包的代价。为了降低这个风险，员工们特意租用亚马逊的服务器来做种子下载，而不是用 Meta 自己的服务器，原因是避免被追踪到 Meta 公司。