They may not have violated NY State rules, but they violated the university's policies.
another thread on this subject
Both the NY State laws and the UB rules are discussed her.
For the record, the UB rule (from their greek life homepage)
Statement of Hazing
Hazing is defined as "any action taken or situation created, intentionally,whether on or off fraternity premises, to produce mental or physical discomfort, embarrassment, harassment, or ridicule. Such activities may include, but are not limited to the following: use of alcohol; paddling in any form; creation of excessive fatigue; physical and psychological shocks, quests, treasure hunts, scavenger hunts, road trips or any other activities carried on outside or inside the confines of the chapter house; wearing in public apparel which is conspicuous and not in normally good taste; engaging in public stunts and buffoonery, morally degrading or humiliating games and activities; and any other activities which are not consistent with fraternal law, ritual or policy or the laws and policies of the educational institution. "