UPDATE:
I think my efforts have paid off.
I have not seen one table/cart on any of the three campuses I've been to this semester.
Maybe it's just chance, but I find it very odd since I've seen them on each of these campuses for years, and now after my complaint last spring (and the director of student involvement's promise to hold them to a university code of conduct wrt proselytizing) there is. . . . .. . NOTHING.