It would be an exercise in stupidity and futility
Really, what's the purpose of recklessly moving money around? I'm not speaking that no one will be moving "mega-money" just for the sake of it, but even if some inquisitive and curious users actually engage in this activity for some time, what will it change in a major way? Okay, now everyone starts to open payment channels and shuffle their coins around, and to what end exactly? To prove that they can?
Futility, perhaps, but also an exercise in freedom.
I doubt that all the BTC currently changing hands over LN are for the purchase of real-world goods and services. Some of it is almost certainly just users experimenting, or even just plain dicking about. And that's their prerogative, I guess. Providing they are doing it of their own free will, I honestly don't see a problem with it. They presumably know the risks involved. If they still want to do it just for the hell of it, then why not?
That's not a problem on its own
The real problem is likely to arise when people start to interpret this as a sign of great success of the Lightning Network technology (which seems to be the case already). Well, technically, it would be so, but I still wouldn't call it a success as the real success will come when it actually starts being used for payments and wealth transfer on a grand scale, not for experimenting and testing or just for kicks ("dicking around")