As a newcomer, I have hesitated to wade into a discussion like this. I am too conscious of my position.
However, something needs to be clarified. It is not about 'if you don't know, just ask and someone will answer'. I'm sure that works but think about this. If eventually everyone only types 'BT' and not 'Brown Turkey', someday someone comes in here and wants find out more about Brown Turkey, he types Brown Turkey in the search function and it turns up zero match. He has missed all the Brown Turkey information because they are all written as BT. Then even if he later knows Bown Turkey is written BT here and he types BT into the search box, guess what? BT is unsearchable. Even VdB is unsearchable.
It is therefore not about newcomers not asking and also not about if people hang around long enough they will know what the short forms mean but rather, in the long term, these shortforms can potentially undermine the purpose of this forum, which is to provide searchable fig info for everyone interested in figs.
I can understand the defensive reactions from people used to these abbreviations. We, and I say we because I am like that too, don't particularly like to be told to change or to do what we don't like to do. We are like that, especially when we think there is really no big issue.
Someone has provided a hybrid solution, ie, exercise a bit of discipline, begin your message spelling out the name in full first and after that, it can all be in abbreviations. Shouldn't be too difficult I would think but this small effort should go a long way.
Just my humble 2 cents. Peace.