Just for the record, I was one of the only twinks running around with 450/450 while the rest had 225. When the door was open and anyone could take the time to go to 450, I used them anytime I could. It was a tool I was given and I took the time to get, just like my AGM or my fishing hat. Anyone could get it. When they nerfed it an others could no longer get to 450, but we were grandfathered, I stopped using it for the majority of the time period. I rarely do arenas, so I don't really care about that etiquette. I have done less arenas in 4 years than some of you have done today.
When blizz made it where 19s could not progress beyond 225, that made it easy for any 19 to get herbalism... even easier than agm for some. If someone does not have it, it's pure laziness. If everyone has the ability to get it, I don't feel bad using it... ever.
I will say on another level, I really wish that the professions were never brought into the game though. I am going to use it because I can, but I would rather nobody have them. Back between BC and the prepatch before WoTLK that brough us professions and acheivements, the game was so much more fun. More respectful players, the community was more respectful, and the boatards didn't come 5 by 5 into the wsg. The enti's bullshit brought a new breed of disrespectful twinks into the 19 twinking too.
In case some of you don't remember, hunters used to be good for spamclips and conc shot and decent dps. There was a time where you'd see 2, maybe 3 in a game.
Now back on point, herbalism is here and everyone can get it. Now that xp can be turned off, THERE IS ABSOLUTELY ZERO EXCUSE not to have it. If someone does and you don't, you should lose because you are not dedicated enough to spend them time to get it. If I was too lazy to get an AGM, should I expect someone not to use theirs against me? NO. The will and it's acceptable.