Yes, as long as you play Single Player or you play with others (like from this forum per say) who are using the trainer...if your playing with someone who isnt using a trainer and they notice 1 hit kills or inf ammo etc, Im sure you'd draw negative attention right.
We could make a MAF Dying Light Guild if you guys want....we all friend one another (putting MAF or perhaps FUN so its not so clear to steam) and play together in co-op games, all of us using trainers, thus no one will b***h about 'some guy who never dies, WTF?!' type of thing as we will all be using MAF's trainer.
Reply if anyone is interested
EDIT
Really? No one is interested in playing co-op with people who are using trainers thus we wont be reported?