E-scooters were restricted to a few areas. When you park them, a GPS has to agree that the e-scooter is within bounds. This can take forever.
I came late to appointments and eventually gave up using them. The apps often have problems processing credit cards. It feels like society is rejecting them, and so they become less valuable. Renting a car is the same price, but with fewer problems.
But that didn't stop someone uninvolved in renting one walking by, picking one up and moving it.
Nothing stopped people just riding along the paths at top speed hitting people or randomly darting into traffic. Soon as you entered any pedestrian square you had to be on the constant lookout for being smashed into by a scooter. Anything near the Louvre was particularly bad.