Bro the one thing I hate in the K-Pop world is the bloody saesang fans. They have no sense of personal space, or any fan that mobs and group, soloist, duo etc, like, would they like it?
Probably not.
So just DON'T DO IT. Leave them human beings alone. Or at least politely follow them! Just give them space and this happens ALL THE TIME, not just because of COVID. Ik I would be p*ssed if I was an idol and the fans kept pushing and shoving me, screaming etc.