Losers who do curls in the squat rack.
true! It's totally annoying. I used to freak out when people had sloppy form and too much weight, but i don't care anymore. They usually have injuries very fast.
What i really hate:
-mobile phones (phoning or rap-ring tones or even worse, listening to music with the phones speakers)
-shadowboxing (kung fu moves are even worse)
-stinking (sweat or too much perfume)
-wannabe hardcore attitude (no greeting, bad-boy-face, gangsta-like clothes and behavior)
-people wearing jeans for workout
-sandnuggas (they are usually listening to rap music on their phone, or phoning, not wearing gym attire, they stink and have a wannabe hardcore attitude)