CHENNAI: Don’t be surprised if you find railway station premises or trains free of unauthorised posters. So far this year, the Railway Protection Force (RPF) has arrested 325 people who indulged in defacing EMU coaches with such posters and collected `1.08 lakh as fine from them. Special teams have been formed to initiate action against firms whose posters and stickers are displayed on EMU coaches. “Only essential public service messages like RPF and GRP helpline numbers are allowed to be pasted on railway property,” said KK Ashraf, senior Divisional Security Commissioner, Chennai Division, Southern Railway.