What actions would be taken besides fineing them and maybe trying to close the circus down?
How would they intervene the battles happen at seemingly random places and rarely take very long? A team maybe trained to help but unless the battle takes place real close to wear the team is located and they're already armed and armored up how will they get there in time? (police her e in the USA sometimes take over an hour to show up, like when a nude guy was running up and down the street with a knife in his hand which happened when I was visiting a friend)
The senshi's ideology would be all the stuff that sailormoon yells at the villians and the government wouldn't have anything against that.
How would they follow them to the fights when they don't know who the senshi are and when the senshi leave they leave faster than regular humans can or they detransform and are just regular girls who happen to be there.
Why would the populace overly fear the monsters? No one's ever been killed by one as far as anyone knows and the senshi always arrive in time to stop the monsters. No one was ever even really hurt by the monsters.