Totally agree here,
Don't read to much into it. When I was at Uni in the UK, it was the total norm to play practical jokes on people. Even if you didn't really know them.
We had cars just jacked up so the tyres didn't quite touch the road, black shoe polish on loo seats, and one of the best someones entire room, bed, wardrobe clothes etc neatly reconstructed in the car park. Of course we all helped rebuild after. If it's nasty it's diffent but college and Uni are about laughs, try not to take it too seriously.
The best I have ever seen was for a medical student whose car was lifted to the top of the hospital and parked on the roof. The crane used was in a building program and taken away. After a laugh we all paid for another crane to bring it back down. Cost a bit but lordess it was funny. And of course the guy who was targeted "enjoyed" the attention.
Jokes are jokes. The young are young. Live it up a bit.
You never know this may be a way of people accepting you. If you can joke back, draw lipstick lips on your forehead, and say I tripped over something and missed.
Hope you are OK. Sometimes we are pretty quick to call discrimination when it wasn't meant. I hope it wasn't meant in your case.
Cindy