It is worth noting that as far as I know enforcement of ticketing was _super_ low in the first place. To an extent this is just accepting the reality that some

It is worth noting that as far as I know enforcement of ticketing was _super_ low in the first place. To an extent this is just accepting the reality that some people will just bunk the fare given that the system is self-managed, i.e. you validate your own ticket. When I've been in Tallinn in the past I've seen people not pay as a matter of habit. This is arguably the logical outcome of public transport. Ticket inspecting is expensive, inefficient and barely effective (without effectively doubling the staff costs of each service) and stopping the bus for the drivers to collect fares impacts the efficiency of the service (e.g. the "classic" old person paying in pennies slowing the bus down). Given that transport is often heavily subsidised by the government anyway this is just giving up on the problem as its hard to find a cost-effective means of enforcing the collection of fares while keeping those fares affordable.