1.) All melee/ranged submissions are pretty much void unless video evidence is 100% justifiable in clear-cut legitimacy. For party runs, it will be even harder to verify, so I'd recommend all those be stricken and void as well (certain exceptions could be made).
2.) Wait for Turbine to verify it has been fixed, then test to be sure it has been fixed. Then the speed runs may resume, as for verifying if the run was made post-fix, it will all depend on when the fix is instated. I'm sure something can be rustled up when that time comes.
3.) Well, most people posting in these kinds of threads are so called "powergamers", they tend to know when detrimental unintended abilities are occurring. It wont be hard to call someone out on their bulls***.