Do you have a problem with this? Here are some things you can do:
To report suspicious incidents call South Yorkshire Police on 101, or in an emergency 999.
To report Anonymously you can contact Crimestoppers on 0800 555 111 or complete the online form. https://crimestoppers-uk.org/give-information/forms/give-information-anonymously
Sheffield City Council work together to combat antisocial behaviour & ensure community safety. To check which organisation to contact visit: //www.sheffield.gov.uk/home/pollution-nuisance/anti-social-behaviour.html