on Corman Drex and EZIC

[Swarm of Bees Wearing Florals]

[GENERAL SPOILER ALERT]

Is there any way to completely not get involved with them at all? Or to report/detain them?

When you're given the paper for Corman Drex, you can keep it the first time (Day 8), but when the second Corman comes (Day 9) they won't go away until you give them the paper, even after you hand back their passport/ID and when the booth has closed for the day.
Then you get handed the coded papers, which get you in trouble whether you hand them in or not (and whether you've actually helped EZIC or not).

Frankly, I want to arrest the ********. Partly to see what happens, and partly because they keep getting me arrested.

[Mandrake]

Corman Drex forces you to give him the card with his name on it, but you are not penalised in any way for doing so.

The coded papers will only get you in trouble if you hand them in, but you can just keep them on your desk and ignore them until they're taken off your hands.

[Sierra Delta]

look at this the agent of Ezic (the blue cap) left the balcony, and I took it and put it on the paper that Corman Drexel gave me and look in him. http://prntscr.com/6czkcu stepheni Graire, can be one of the agents. (Google Translate)