When you post something a bot is looking for stuff on it, but someone managed to post this without any issue:

https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3600157516

Of course in such case you can report but I believed the bot was looking for some keywords used to insult, like the 'f u" part completly written. So what does it do in reality ?