Detect a flashbang? Press lmb. Evading those are as easy as moving your mouse but evading nades are slim. Therefore a direct comparison between flashes and nades is illogical. Reason why nades are prohibited in interiors is cause of the immense splash damage it can cause in cramped up spaces. Throw one, kill 3 comrades, deal with reports. Whereas FBs are made to stun and ambush in narrow spaces ever seen a cop throw a FB at you in broad daylight when you got numerous places to run to and are open? That's illogical. The essence of using flashbangs is in interiors. Therefore, comparing them with grenades and proposing a cool down would make them useless basically, it would affect the squads in JBs and BRs as many a times, players don't even see the flash when thrown at a distance such as Jail last corridor end to end and just see the default smoke nade. We squad members aren't that retarded to keep throwing flash after flash as it affects our comrades too. If you see someone doing that you can report to his squad respectively. Flashes as said, only cripple your aim but you can immediately crouch and shoot and kill, jail and BRs being narrow places with the Health bars showing. If you wish to add a cool down to flashes then the logical change would be disable fire ability and increase stun time. You're just crippling an already crippled resource that helps us make a small difference or two, not everyone can pull off a flash ambush perfectly.