everywhere, from phoenix to miami and the deep south. they're zipping across the nation, along the way winning over fans. >> i would give them an "a," definitely an " a" because they are reliable. >> reporter: and gaining enemies. >> people just ditch them or misuse them and so they kind of get in the way a little bit. >> reporter: they've been called revolutionary by some. >> back to the future, you know. >> reporter: and unsafe by others. >> they're dangerous. >> reporter: graham, a west baltimore artist, say scooters are an easy way to get from point a to point b. >> check one of the four apps and i look at where the closest scooter is. i walk over, grab it, and take it where i need to go. >> reporter: baltimore started a scooter program last year and the department of transportation says it provides 45,000 rides a week. >> our goal is that it would increase access and it would provide more sustainable