Two suspects, aged 21 and 20, have been arrested and charged over the incident in Paisley on Friday.
Four young men have been charged following the incident in Cambuslang on Friday night.
The 17-year-old, who cannot be named for legal reasons, kicked a constable outside Hampden Park.
The 40-year-old male staff member was uninjured, but was left 'in a state of shock'.
Police Scotland said it would offer Gary Webb an unreserved apology.