Cyclist John Gent, who filmed a confrontation with a PCSO in Gosport, then recorded video on his phone of police officers who visited his home to talk to him about the incident.
The officers raised no objection as they explained to him what they were doing - and then said that they too would video the conversation.
Police said that PCSOs can detain people and take their details – but only for specific reasons.
They can issue fixed penalty notices for riding on footpaths and stop cyclists under the Anti-Social Behaviour Act to issue an FPN. They can then ask for a name and address for the FPN.
Powers also include detaining a person for up to 30 minutes until a constable arrives.
Cyclists can be stopped in Gosport’s High Street and issued an FPN for riding along it.