I have to agree with blackmagus, here. When the 2 character allowance was added, I tried to figure out how to do it under the rules.. i.e. not excessively scripted. I kept dying when I tried alt-tabbing, and I'm not much of a coder, so I ended up on split-screen. As I was struggling through this, I watched others casually play 2 with seemingly little effort, and thought.. well, I guess I'm just bad at this. :)
Turns out, if you rescue-script, skill-script, have enough conditional triggers, and are possessed of a casual disregard of how the rules read, you can just sit in one window and ignore the other. Certain classes are easy for this (mountain scout, I'm looking at you, but as you're a completely scripted class, you won't notice.) Others require a bit more effort to do properly but are easy to do at a somewhat less effective level. Regardless, I believe it was Oligo who showed what a skilled coder can do client-side when he botted an 8man some years ago.
Now, certain parts of the current policy, I feel are overshoots (disarm triggers?). However, I have to wholeheartedly support the ideas behind the policy, and if I had to pick, I'd still rather the imms go too hard on this issue if they have to err one way or another, as the last few wipes have largely incentivized certain 'accepted' types of cheating, such as trigger-skilling certain skills hated by all.
No matter who you are, how long you've played, or how knowledgable you may be, nobody is owed a legend. If you want the juice, put in the squeeze.
Jason