I agree on the noob builders, but thats why communication is important. If i am going to decon a bad placed turret, i do not only decon it, i EXPLAIN why and SHOW how it should be done. That way, you both got someting out of it. The noob learns, step by step, and you won't be frustrated anymore because of his lack of sence ...
The campers, well, there's nothing you can do about that. If they kills a dragoon which is hurt for 80% by turrets and 20% by the camper, they deserve the 20%, no?