Or take the bike to work. But what if you have multiple bikes There have been some pissed off people browsing local finnish forum, facebook etc. hoping to find a certain bike or rider. I don't know what they would do if they found one and a picture of it with a visible plate and I don't want to find out. Also sometimes police might be interested, I am pretty sure they have even gone that far to catch some idiot on a street bike caught multiple times in the speed cameras (local cameras take a picture from the front). So any identifying information, stickers etc. may get you in trouble along with the plate.