There is indeed a process for reporting leechers, AFK's, suicide drowners and clowns....
Some, if not many on this forum believe the reporting process is useless. Some may not have what they consider the time or inclination to take screenshots and submit a ticket. Others I'm sure are likely over-reporting for any little thing such as shooting premium ammunition (I've seen this - proof is on a WoTLabs thread. Look for yourself, I'm not linking it here).
The bottom line - The more of us that submit legitimate reports of botting, AFK play (not disconnects), suicide drowning because "boo hoo", the sooner the staff can weed out these clowns. I've read on a few other sources that players didn't even know there was a reporting process. I'm confident some on this forum didn't even know.
TL;DR
Report clowns for incessant clownery.
Here's how: