Now, this is my question:
Where do we draw a line? Between non-TTing players and TTA? A lot of people defend Time Traveling, and I don't care how YOU play the game, BUT when you're Time Traveling clearing abusing it, I don't find it any more honest then duping at that point.
Why do non-TTing hate TTing so much?
Why are people so hateful towards the subject in general?
Where do we draw a line between TT and TTA?
I don't really see a need to draw a line; it's their game, no need to draw a line imo.
People hate TT'ing for any number of reasons, and these reasons vary depending on the person in question.
For instance, there are people who believe playing a game the way the developers don't recommend it to be played as cheating because that goes against their morals. Such people see those who would desecrate the world developers work tirelessly to create as disrespectful, and wrong.
This next reason is relatively straightforward: a non TT player does his/her daily grind amassing bells and other goodies over a period of weeks/months, only to find out that there are those who have achieved significantly more than they have, in a fraction of the time by simply time travelling. This realization would make the non TT'er feel as though their hard work had no meaning-- that their accomplishment has no real weight, that noone will really care about what they achieved because it's subpar, or standard compared to what a TT'er has. This stirs feelings of indignation and resentment towards TT'ers, and this sort of thing is a cycle, really.
Let's take a look at the other side, from the TT'er perspective.
As a TT'er, they may just have a busy schedule, adult life, work, children, school, and the like. These people with extremely busy schedules cannot keep up with a non TT'er who has a more open schedule, and because of this, they TT to get their shops made in a day, find their dream villager, or whatever the case may be. However, some non TT'ers that feel resentment towards TT'ers in general voice their (loud) opinions through all avenues of the animal crossing community, branding all TT'ers as "cheaters," and some even through them into the "hacker," category too, even though many TT'ers are doing nothing objectively wrong. Naturally, this causes some people that use time travel to feel awful, or hesitant when talking to others about the game.
There's other stuff of course, but it's basically this imo.