Aw come on, I know youre username is Complainer but seriously - going to the gardai over "cheap" drink promotions is a bit OCD. For example, €4 for vodka/dash is what it should cost in reality anyway, similar for bottles of Corona etc which are sold for as much as €6 even though they can be gotten for under a euro in off license.
These types of nights were the best nights out back when I in college, to be honest you sound like a bit of a kill joy. It really is getting to nanny state levels when Joe Public is now complaining about stuff like this.
I'll remember that the next time I have to clean vomit off my car and brush broken glass up from outside my house on a Sunday morning after someone spent the night before out "enjoying" themselves. I'm just being a killjoy in wishing they wouldn't do that