Undercover policemen have infiltrated most things.
In the UK, police helped a bosses' cartel 'in a huge blacklisting operation in the construction industry'.
Peter Francis, a former agent with London's Metropolitan Police Special Demonstration Squad, has now told a meeting in Parliament that he spied on firefighters, teachers and postmen - as part of his undercover duties.
EX-SPY COPPER ADMITS UNION INFILTRATIONS 14 MAR 2015 / Undercover whistleblower Peter Francis.
He said that members of the National Union of Teachers (NUT), the Communication Workers Union (CWU), Unison and the Fire Brigades Union (FBU) as well as the National Union of Students (NUS) had been targeted.
Last week it was revealed that SDS officer Mark Jenner had been sent into builders' union Ucatt.
Engineer Dave Smith said that 'coercive arms of the state' saw their role as supporting big business.
He said: "Trade unions and peaceful campaign groups are viewed as the enemy."
The police spied on "National Health Service whistleblowers."
Unison general secretary Dave Prentis said: "The revelation that union members were spied on by undercover police officers simply because they belonged to a union is shocking."
CWU general secretary Billy Hayes said: "Once again the secret state is revealed...
"More transparency on such matters would perhaps have avoided some of many miscarriages of justice, including Hillsborough and the Jimmy Savile cases.
Some police officers entered long term-relationships and even had children with activists.
BUSTED! Canada Supports the 'Islamic State'