What happens if I click the "I hate hats" link in the winter bash menu?
The mouse pointer tooltip showing "opt out of winter bash", what does it mean?
From the 2022 Winter Bash FAQ:
I don’t want to see any hats! How do I get rid of them?
When you click the snowflake icon in the top bar, a popup appears that has a link labeled "No hats for me, please". This will turn off all hat-related events on all sites for you. You won’t see people wearing hats, you won’t be alerted when you earn a hat, and you won’t be seen wearing a hat by any other users.