How come bots and afkers are still there?

Ok how long has this problem been going on for? I just did 5 freaking battlegrounds where we had at least 2 afkers/bots the entire time and we couldn't get rid of them.

2 may not seem like alot but in 10v10 or 15v15 it actually is, cause you and your team DIE alot quicker because you are out-numbered. Please blizzard can you just fix the problem already? I know that it cannot be fixed in an instant but please this problem has been going on for MONTHS!