Your impressions of Balliol and Trinity?Watch
I'm not super familiar with either college, but stereotypically, Trinity is a bit more right-wing than Balliol. Though that's not to say people at either college are horrible - I know some great people at both. I do know that Balliol has one of the few remaining student-run bars, which means cheaper drinks and a nice social space, as well as the opportunity to work there if that's something you're interested in.
I'm actually not sure, I haven't heard of that! But I've only just started studying here as a fresher so I'm probably not the best person to advise you on little Oxford traditions like that haha, sorry.
Oo you should go read about that. It is quite famous and I found it rather amusing the first time I learned about it. The rivalry literally goes back hundreds of years.
My sense is that this kind of witlessness is nowadays no more common than similar "student pranks" at other unis. "Traditional" intercollege rivalries do surface from time to time, but are now mostly sublimated into sports events. But I could be wrong.
Where I come from, we don't have rivalries. Though, our Trinity College is just as snooty to the other colleges as the one across the pond in Oxford.