'Tis the nature of glee, for sure. The plots are not exactly subtle or nuanced. However, I have to admit that I actually laughed at that scene (although they did ultimately take it WAY too far with Santana repeatedly being SMASHED into lockers). I like both Santana and Lauren a lot, and I think that the fight kind of worked because it was actually in character / good character development for both of them - something that doesn't happen that often on Glee! Santana was being her regular ballsy / bitchy self, and she went over the top with it, as per usual. Lauren was kinda laid back, kinda 'You really wanna do this? OK, whatevs, I guess I have to SCHOOL A BITCH' I like Santana, but she actually doesn't get her comeuppance as much as she should.

So yeah, that scene actually kinda worked for me in a weird way, but if you look at it realistically AT ALL, it was gross. But it's Glee - they write their plots with a paint roller rather than a quill.