"No, I don't, because there was not control over [the Undie 500] anyhow," Mr Chin said yesterday.
"The reality is the people who organised these events had no control over who attended the event and what happened after it. It was no more than a pub crawl."
Mr Chin led Dunedin authorities in a refusal to support proposals from the University of Canterbury Engineering Students' Association (Ensoc) and the University of Canterbury Students' Association for another Undie 500 this year after last year's disorder, which saw more than 60 people arrested as a result of drunken violence and fires in Dunedin's student quarter the night after the rally's arrival.
Since Ensoc began negotiations with authorities about this year's event, Otago University Students' Association and Otago Polytechnic Students' Association presidents have repeatedly warned that, without the support of local authorities, the event might be forced underground.
Mr Chin said he could not stop people coming to Dunedin, but all he asked was that they be careful and conduct themselves within the law.
"Because they could regret it later on."
It has been confirmed this week that an unknown number of people will be travelling south as part of an unofficial Undie 500.
A Christchurch report on Wednesday said about 30 students, from one University of Canterbury hall of residence alone, had decorated vehicles and were planning to travel south today.
They expected hundreds more from other halls and the university to join them, the report added.
Any Otago Polytechnic students contemplating joining in potential disorder this weekend received a clear warning from their student leaders yesterday.
"The OPSA [will] expel any members guilty of violence and damage at the event," co-presidents Megan Cloughley and Ryan Ward said in a statement.
OPSA had chosen the extreme move of expelling members because of the false image of students the Undie 500 disorder portrayed, Mr Ward said.
OPSA membership is compulsory for all polytechnic students.
Members expelled would lose their student IDs and access to any of the services offered by the association as well as membership of the polytechnic's clubs and societies.
"We are sick of the Dunedin community and students being seen to be part of this. These groups need to understand that drunken parties which predictably lead to street violence and property damage is not acceptable. It's just bloody stupid," Ms Cloughley said.
"This is no longer an event for entertainment value, it is purely poorly organised public disorder, and anyone guilty in such illegal activities should be punished to the full extent," Mr Ward said.
OUSA president Simon Wilson said OUSA would deal with any fallout after seeing what happened at the weekend.
