Zo
Well I think it's your professional duty to report a forged script, and I always have. To be honest I haven't seen one in a while. The trouble it causes you is definietly not worth it.
I once saw a young woman (18ish) just putting goods in her bag. I just walked up to her and said "put it back, and please leave" as I couldn't be bothered with the police statements, court, etc etc She just turned round and went crazy, throwing punches at me. I managed to get her in the old "swan-neck" and had to hold her on the floor for about 15 minutes before the police arrived. They took her away, more statements, more court time, and what did she get? A £40 fine!