The offence — alleged littering.
Activist Sheila White says it can lead to other anti-social behaviour, including urinating in a public park or smoking a crack pipe.
Ford has admitted to smoking crack and police documents include photos of the mayor apparently urinating in public.
White says while under police surveillance, Ford was seen with another man in a secluded park.
A police document says police found bottles when they went to the area after Ford left.
Littering is an offence that's largely ignored, but it's everybody's problem because it happens in public spaces, White said during a press conference about a new report on littering.
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