"This behaviour is dangerous, causes damage and needlessly ties up emergency services.
"We are working with the Fire Service again in 2020 as we have for several years with an education campaign for students around this dangerous activity and fire safety in general."
Mr Scott said the university had largely been satisfied with behaviour during this year's
O Week, but there continued to be problems with non-students coming into the student quarter and causing trouble.
In the report, Mr Scott said largely thanks to the introduction of CCTV, more fire-lighters were being caught and held accountable.
He also commented on the continued trend of students, largely second and third years, returning to Dunedin a week earlier for "Flo Week", or flat orientation week.
Mr Scott was also concerned about the growing popularity of the Agnew St keg party, which is held in August.
The event had grown from a smaller localised event that several hundred attended, to a "large street party involving thousands".
There was discussion with community partners and Otago University Students' Association about the future of the event this year.
While the number of fires had risen significantly, the total number of incidents dealt with by the proctor had stayed relatively flat, increasing from 875 in 2018 to 891 last year.
However, the number of students dealt with by vice-chancellor Harlene Hayne for serious misbehaviour significantly increased and three students were punished by being excluded from campus for a semester.
All up, the vice-chancellor dealt with seven cases last year compared with none in 2018.