I suppose that's a good point, when selling T's anyway.I think there are variations in use of this term. And if we are going to discuss use of the term "aggressive" in this forum then we must also expand it to the whole T marketplace. Many vendors use the term "aggressive" for T's that will try to bite you. I personally think it is a good term.
Aggressive = The T that will try to bite you if you get within its sensory/vision range (too close)
Defensive = The T will sit in the same position or retreat while bearing fangs but will not advance forward.
Otherwise it is incorrect to say they're aggressive, as they really are just defending themselves because they feel threatened.
I dislike it when people use the word aggressive when talking to people that don't know much about the animals, in particular.
Like my best friends fiancé, asked me the other day.."are your snakes and spiders are aggressive?" (Trying to convince her to come round and get over her fear slowly).
I think it's important to make the distinction that they're not aggressive and not out to hurt you, unless you make them feel "scared". This is often how people start to fear these animals, when people start to throw around terms such as aggressive, or brandish statements such as "they'll chase you round the room".
As it makes it seem as if these animals want confrontation, and want nothing less than to end your life.