The biggst problem with Kaljakellunta has been the mess it leaves behind throughout it’s 20 year history. It’s particularly annoying to the residents who live along the route, as they find their local area turned into a dumster after the event. Luckily this year there is a volountary cleaning event organised for the day after, that can be found here.
Please keep in mind though, that the most important thing is preventing the mess from happening in the first place. Remember to take a bin bag with you to put your own trash in, that you can throw into the dumster at the end of the route. Imagine, if everyone would just collect their own junk we wouldn’t need this event in the first place! So please do keep the event clean.