It's not all that easy to kill ack huggers. Yes it sure more challanging to kill them, but it's more fun too. Remember you always above them and a lot of the time, ack huggers won't have enough alt to split s. This leaves them in horizontal manuavering. Seddle up high on their 6 with a bit of horizontal separation. Now dive. When diving do small alternations in your flight by moving elevator up and down. Since bogey will most likely brake flat right or left, you'll be also correcting your flight path to stay with him. All this makes ack less accurate. Give yourself as little time of straight flying as possible when you enter gun range (400 or less for me). During egress I usually don't push my plane right away back in vertical, but will try first to give myself horizontal separation from acks, then work back altitude.
Also remmeber, ack hugger constantly moves around the field. Do not attack when he's flying towards the center of the field, get your timing right so when you attack him, he'll be as far from the edge of the field as possible. I do not attack targets that are in the middle of the field, amount of tracers around is just to much for me to handle

I hate ack huggers, but I love killling them. And I always make sure I get full credit kill for them. If I see guy taking damage from me and then trying to ditch on the field, I follow him in. I might die, but not before I get that heart warming "Kill x awarded to mx22 of 308 Squadron"

Just my 2c on the topic
mx22