Although I may not like trots, I think snitching on them to campus administration isn't the correct move, as it just sorta makes you look like a Bootlicker and needlessly sectarian.

Also, before completely rejecting them as undisciplined or revisionist, I recommend actually speaking with them. You will probably have some ideological disagreements, but if they can be put aside for the sake of organizing then I'd suggest that. It's more likely you'd be able to convince some of them into being Marxist-Leninists if you're organizing together towards a common goal.

If they're not willing to organize with you due to sectarianism, then you can bring that forward when organizing with other student groups.