I totally agree with vladimir. Its a grave concern and it must be stopped. I have faced the same and i would like to tell everyone in who is from aesi and is doing training "don't dig hole for your fellow aesian's, set a good example".
The day i went in NAL for the first time, i felt and i felt it again today through a friend of mine. Please don't dig graves while you are doing training.
What do i mean? I mean don't commit to any training if u are not serious of continuing it, don;t come to training for "...aisse hi kar raha huin, kuch aur karneko nahi hai". This is injurious to everyone including you.
While on training two things have startlingly become clear to me, one aesi graduates are truly knowledgeable and i have heard senior scients acknowledge the fact and the other not so good fact is that aesi folks are not responsible. The first thing my guide scientist said to me as i asked for training under him was, " aesi guys are good but you folks are not trust worthy, i know u will leave any day!, sorry i can't take you.", And i would have easily vanished his remark if i didn't have the knowledge that he is talking from his personal experience.
I was lucky that i could convince my scientist and got this but not everyone gets that and today as i saw the face of one of my acquaintance, who didn't get training just because some few lucky idiots got the chance easily and dumped it when they wanted, without even bothering what repercussions it will have on future persons who seek the training seriously and who need it.
And on the final note, the CTFD head of NAL, i heard said pointing to three students of aesi doing training there,"This is the last batch of aesi in CTFD , i won't take any more"