There are other risks though - I always found it odd that motorised scooters are allowed on the bike paths. My Dutch neighbour had a very bad accident when one hit him on his bike and was off work for quite some time.
Amsterdam is also pushing very hard to get an exception to be able to force them onto the street though.
("Herinnering: <scooter icon> op rijbaan", example here: http://www.rotterdam.nl/Clusters/Stadsontwikkeling/Document%...)
Although I think that it's illegal for them to ride in the bike lanes (or over 25km/h? or both?), they still do it