Second, "laws ant UT" assumingly means, "laws at UT." Responding with that assumption, there can't be laws that infringe on one's constitutional rights to free speech and peaceful assembly in a public area.
Third, the curb may be PUBLIC but so was the PUBLIC campus. Both spots are equal in terms of being public.
Fortunately, there are no laws against being an asshole, the reason probably being that the term is a bit relative.