That would also be an exploit if we are going by the definition of using unintended mechanics to gain an advantage. So the better question would be, are you for or against exploiting.
I am against exploiting, yes. But my definition of exploiting is fairly tightly focused - as in, there are only few things I consider exploits.
I asked re: the for or against high res logging because it seems whether you believe trade and high res logging are exploits or not - good or bad or not - it is consistent to believe both are bad, or both are good. But highly inconsistent to believe one is ok, one is an exploit since as you pointed out, uses same mechanic (log out) to gain same advantage (time avoid flying in-game space).
My definition of exploit is easier related as simple examples -
1) Finding some quirk in an RPG where if you click the buy and sell buttons really fast, gets you free loot - I consider this an exploit because it is taking advantage of something obviously not intended. (e.g. goods are meant to be purchased, yet you get it free)
2) Using a mechanic that exists to do what the mechanic is advertised for - logging out to log out - and finding as a result that it saves you time, I would categorize as min/maxing, which is a behavior some people chase, some don't care, and some call exploit. I don't know if can ever be factually decided who is right or wrong - the bottom line is whatever the game manufacturer calls an 'exploit' is, and what they allow 'isn't'
But my personal definition is that if you use a mechanic the game gave that does exactly what the mechanic is supposed to do - log out = log out, then any other side effect is like military tactics - there is no fair or unfair about surprise attacks, it just is part of min/maxing your superiority or options over another. You either choose to use it in that way or not.
But if you use a game mechanic that does the opposite or complete different from what it is supposed to do - Buy button that is supposed to buy commodities, but gives you free commodities instead - then that is using a game mechanic outside of it's designed function, and the side effect of free goods is an exploit.
Long answer to a short question but best I can do. I also don't acknowledge there is any more veracity to my answer than anyone else. Ultimately, 'exploit' is whatever the game devs says it is, and whatever they allow isn't. Doesn't mean we can't have opinions about it - but pretending there is an actual definitive line that proves one party right vs the other is in my opinion pretty silly.