Truth be told - those who have acne (especially the cystic type), it's rather disgusting to use the equipment right after them or be nearby them at the gym.
I've seen some users with it so bad, that if you are in their vicinity, some times you wonder if you will catch some venerable disease from them. These users should know better than to wear wife beaters. Every twink nowadays seems to be doing the same or/and wearing dri-gear. And in the long run acne ruins the skin with the scars, that takes a long time to heal. So opt for preemptive action, especially those prone to breakouts.
Pick up some Vit A Acid cream or the gel (Prescription only -0.1% is the strongest). With that you never give anything a chance to ever appear. I only ever get the occasional pimple on the face. Now i apply it once a week. It's kind of like taking pre-emptive for weapons of mass destruction that are not their. Eliminate your enemies before they have a chance to speak the truth.