This was back in Year 9.
EDL just so happened to be a big thing back then and i over heard that its best not to go out during the following days and that they have a grudge against asians (basically i generalise this to brown people (me)).
So being the ignorant person i was; i wrote the most racist poster i could think of during my RMS lesson - ADL - where i said us brown people will throw crap at the white people, we will beat them up, etc
The white people in the class got pissed - gg i forgot that my class had white people and there just so happened to be a ultra(posh, high class, classy) white guy in class who chose to snake me out to the thankfully black teacher - who just so happened to be the calmest teacher in the year.
He basically took it seriously and i had to continually say i was joking and thankfully the other brown guys in class understood this and helped bail me out of the dire situation.
When i think back to it i lol since most people dont bring it up and thankfully my teacher didn't tell the head of sixth form otherwise my chances of staying in the same school i am currently in for sixth form would be low.
I was bare teary eyed at the time, since i was always a good kind guy and the 'calmest' teacher told me off while threatening to tell senior staff, the head teacher, my parents and thinking about it now - **** up my impressions with white teachers. (lucky thing he was black, otherwise i think he might have done that.)
gg all i can do now is lol and move on.