@SW15 I cannot find it anymore but Good Looking Loser had a great article on college life years ago. What he basically said is that college is even more status-driven and has more of a hierarchy than high school ever did. If it is situated in a college town, I would agree with him. I think that cold approaching needs to be done in a very calibrated way because you can easily go from smooth guy getting numbers to campus creep. In fact, PUAs have often been outed at college campuses because they decided to do their bootcamps there or run spam approach game. Word gets around very fast and regardless of the size of the school, it starts to feel small.
In college, women care a lot about who you run with. Girls want to know that you are cool and have a lot of friends which can be tough to do in most cases. You have to pick for lonely and desperate girls in order to make it possible to pull with ease. After college, the better looking women become more available to guys that would normally cold approach.
A girl getting with a cold approaching rando in college is seen as low status. This is why so many college girls love vacations and internships in big cities, they can actually sl*t up more as opposed to being under the watchful eye of their social circles.
Can cold approach be done in college? Yes, but you have to be calibrated with it and not come off as too aggressive. Unfortunately, most PUA guys do not get this and will immediately become campus creep.