Mae’r CSOs yn rhan flaenllaw o’u cymunedau, gan ymgysylltu â phobl, darparu sicrwydd a mynd i’r afael ag ymddygiad gwrthgymdeithasol lefel isel.  Er enghraifft mae Tîm  Plismona Cymdogaeth De Gwynedd wedi gweld gostyngiad o 29% mewn ymddygiad gwrthgymdeithasol ym Mhwllheli.  Yn y De, ymunodd CSOs â’r Ymarferwyr Troseddau Tân i ddarparu presenoldeb gweledol yn yr ardal ac i roi tawelwch meddwl i drigolion lleol. Daeth hyn yn sgil nifer o ddigwyddiadau, gan gynnwys rhai tanau bwriadol bach mewn mannau cymunol mewn blociau o fflatiau. Ymgysylltodd y CSOs â phobl ifanc i’w cynnwys mewn gweithgareddau i’w difyrru,  a dosbarthu taflenni gyda negeseuon atal a hynny trwy’r Swyddogion Cyswllt Ysgolion.
The CSOs are highly visible in their communities, engaging with people, providing reassurance and tackling low level anti-social behaviour.  For example the Gwynedd South Neighbourhood Policing Team has seen Pwllheli experience a 29% decrease in anti social behaviour.  In South Wales, CSOs joined forces with the Fire Crime Practitioners to provide a visible presence in the area and give public reassurance to local residents. This followed a number of incidents, including some small deliberate fires in communal areas of blocks of flats. The CSOs engaged with young people to involve them in diversionary activity, and distributed flyers with prevention messaging through the Schools Liaison Officers.