The scene with the disastrous ED-209 demonstration where the malfunctioning robot shoots a board member. It's only later when it occurs to you, "Hey, who was the moron who loaded that demonstration robot with live ammunition?"
Fridge Brilliance: Which slimy corporate suit has reason to sabotage the project? That's right, Morton, the one that shortly afterwards has a good cop - Murphy - butchered so he has a test subject for his project.
Another possible Fridge Brilliance: Dick Jones is so morally lacking and confident he might as well have ordered this himself. Seeing the reaction from all the co-workers in the bathroom would explain why nobody would talk back.
Why would they show the flawed prototype RoboCop 2s?
With Robocop essentially being a successful, if controversial product with the guy who spearheaded the project dead, they'd need to make more. Just as Dick Jones unveiled the ED 209 to the board, the Old Man would undoubtedly want a progress report - it is his company and his money, after all. As such, they're kind-of obligated to show him how things are going.
Wouldn't the convenience store robber have had to be just as strong as Robocop to hold his rifle steady while Robocop bent the barrel?
Most likely he had a rage and shock fueled death-grip on it.
No matter how tight one's grip, adrenaline alone can't give someone the strength to do what takes a hydraulically-driven machine well over 5000 pounds of energy to do. Since The Dark Knight made this exact same mistake, it's 99.9999% more likely that Hollywood writers simply don't know what leverage is.
One of Boddicker's men is holding a grenade launcher and has a clear shot at Robocop who's distracted by Boddicker. He puts down his grenade launcher and goes to activate a crane so he can dump a ton of scrap metal on Robocop instead of using the weapon that he was specifically given to kill Robocop with. Unless he was out of ammo, that was a pretty boneheaded move.
Boddicker was close enough to Robocop that he could have been seriously injured or killed by the explosion or flying shrapnel. The guy was putting Boddicker's safety ahead of killing Robocop; the gang as a whole seem to be close, and at the very least, Boddicker's the one with friends in high places that makes him so successful. Besides, Robocop was immobilized by the scrap metal and thus an easier target.
The movie started off bad, then it got worse for Robocop, a law officer named Murphy. Think about it.
The reason why ED-209 shot Kinney even after he put the gun down: the robot says "put down your weapon," and Kinney throws it away. ED-209's sensors did not register Kinney's motion as setting the gun down as instructed, so, to ED-209, Kinney hadn't complied and still had the gun. This is why Robo operates better; his human brain can make these distinctions without deliberate programing.
From a corporate stand-point, Dick Jones' "guaranteed military sales, 25 years of spare parts, renovation programs" plan for the ED-209 turns out to be much more solid than Bob Morton's: Robocop is not cost effective, he's irreplaceable, and needs millions of dollars of maintenance every year. Meanwhile ED-209, while not very good at police duty, is a capable (and easily manufactured) sentry bot and widely employed as security/military drones. Even its toys are very popular and sought-after in the real world!
Public servants are forbidden to strike. However, the police are a subsidiary of a private company and overseen by the villain who has no regard for them. The strike is in fact useful to both parties as Jones doesn't need to worry about any police coming to Murphy's rescue and interfering with Boddicker. Robocop himself does not have to worry about innocent cops getting in his way or being stopped from doing his duty by the police retrieving him and shutting him down.