Yes. When there is a post awaiting moderator review on one of my sites everyone can see the toilet paper emoji next to the board listing. I also have animated CSS that makes an emoji of a spy pop up behind threads in a couple themes. During Halloween I have an emoji bat emoji fly across the screen and a spider emoji drop down assuming the client does not have animations disabled on their desktop as I respect motion preferences. [1] (click set to use the spooky theme)

It may be silly to some these days and that's fine with me. I enjoy it and I have an odd sense of humor.

[1] - https://altchan.org/Theme?theme=spooky