"Hacking" to get gear is not the same as manipulating packets for some game-breaking drops or enhancements, and as I said I doubt its even plausible, even if theoretically possible.
There was past techniques to cause d/c which would roll the char back a few secs before the update, or ft2 type glitch where the whole server would reset and rollback a few secs. About as close as you came to anyone using a enhancement hack that I know of.
Gear is irrelevant if you can nocd/skill delay without dc, or walk over/into walls in dungs, in most situations they could just pew pew with little to no dmg taken if they know what they are doing. Even with a base char 150 you could put on all junk 3-4% amp gear and the advantage of nocd/delay without dc would outweigh any potential dmg given from gear and normal re-targeting, add to that the possibility of doing this inside a wall or behind something without being touched, thats why logically its not relevant.
The average CE user would probably want to attempt to make a profit off it somehow, but realistically anyone whos packet editing probably has different priorities then becoming all +15 gear or showing off, that would sound like the typical CE user

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