I don't usually comment on suggestions; thus this already being a rule and some people do it while others don't. I personally enjoy rolling to see who goes first as it makes it fun and fair chance.
With KPD, we are trained to act on situations, if you are out of range and you run up to us with a weapon, we automatically have the right to tase as our lives are in danger within that said moment; however, if you ask beforehand that you want to do a proper combat situation, let us know. We are always up for it because we enjoy it (Well, I like to think some of the KPD do, I do that's for sure) - Thus i always roll 20 to with the person im doing hand to hand combat with to see who goes first. It's not a major rule people obey by, but it's a rule that is often skipped over.
Like Infi said, If you see KPD using keybinds (Which we are not allowed to do, we have to do a semi-long action to tase or to pat down etc) then report it to Hira or any other staff member!
Keep in mind, when it comes to 1v1, we do not roll for it. It is a one verus one situation, but if there is MORE than one person, roll for it. There is no logical means to do it for a 1v1 situation