Just chiming into this dead site :P to say, concurring SDM, I think it's pretty sensible to allow cleverly manipulating Tails' AI (so long as gameplay's kept 1P), in keeping with the classics like the strat Zeupar pointed out, and the rules should be revised to explicitly clarify this.
One could argue both ways for allowing S+T flight in S1 2013 so long as double ring credits aren't earned, vs. banning it outright; personally I think the former, à la CyberScore's ruling, is best and the lesser of two evils. I feel players have a responsibility to ensure they don’t earn double ring credits with S+T flight, and if it's too difficult to manually track they should record their runs, which I don't think is much to ask for this in this day and age to be honest; I also feel, like hfactor66, players shouldn't be penalized for accidentally grabbing onto Tails where it doesn't otherwise affect the run (which can unnecessarily complicate some strats).
Ultimately more active runners of the affected games need to discuss both of these rulings (on TSSC or wherever convenient) and come to a consensus; it's good of you to check and raise the discussion hfactor66.
On a side note, the "difficult to verify without video proof" argument could be extended to numerous legal tricks and at the end of the day, you have to operate on a merit and trust system in cases where video proof isn't mandatory (but yeah, it is here universally for 1st place stats anyway, at least).
Finally I also feel it's a given S+T flying in Mania should be legal as there's no reason it shouldn't be (we still need official rules for Mania derp).