With your light in your right hand while holding the scooter in your right hand also, then reeling out with your left hand is no problem. Reeling back in is harder. You need to let the line accumulate behind you first, then stop scootering, and reel it in to take up the slack. You always need to keep the scooter away from the line, because it can easily suck it into the prop.
I think of other things that are worse recipies for disaster:
1) 3 person buddy teams
2) no backup timer-gauge (other than being dependent on your buddy's)
3) single deco bottles (versus 2 of everything)
4) leaving your snorkel behind for open water diving
5) dry gloves
6) wearing multiple tanks all on one side
just to name a few; getting back to the original question.
I thought the general consensus was that your opinions were only important to you. N Didn't you get the memo? Nice to see you added dry gloves to your list though and you forgot to add multiple backup SPG's. Sounds like more trolling to me.