Anything that relies on the rapid press of a key or button can be Macroed and exploited.
Macro can fire semi auto clip in seconds.
Macro can escape a net instantly.
Possibly anything else that requires this (pistols)
Add a minimum time to these things so they cant be abused.
you could conceivably mash a button phyically 6-8 maybe 10 times a second. some people im sure can do more. but limit it to something reasonable.
Weapon fire should be limited to the rate of fire that is identical to its full-auto mode. (if it has one)