[polaroid]

I understand where you are coming from, but honestly it does not take a lot of time to tab out to forums and do all that. 
First you open their steam profile then you get their id from that. Collecting their ID is a part of getting evidence. Also most people tend to break the rules over enough time to do all this.

Being too lazy shouldn't warrant an action.

Although I do understand where the idea could be useful, but I don't think there's a command that automatically gets steam id for you. Even for bansteamid we need to search for it manually. So that's still a thing you will need to find on your own.