Clones would be fine. Would definatelly grow-out a strong male for breeding, tho.

Keeping an oscillating fan on them 24/7 is your best defense against stretch like that, but bending and tying is often the remedy. But some strains are just friggin leggy no matter what you do.
Once you train the plant to a support, it's an uphill struggle getting the stems strong enough to support eventual budweight.

Were your feet dirty, I'd recommend re-vegging, but I don't even know if that's possible with hydro.

Lastly...would vote your friend off of the island before they can do any more damage in your growroom. :thumbsup: