Tie a brick to it. That will stop it from floating away?

Or aim it at a reef. Wont float away then.

Invent a boomerang kon tiki. Hopefully it will sail off to Australia.

Teach it to come to a whistle. Wont hear you 2 ks out but at least you'll know its obedient.

Give it baked beans for breakfast, might still float away but at least it will go out a bit faster (fartster)..

Invent a disposable kon tiki. But then again there all disposable really arent they.

Particularly the ones that have owners who set them about 20 metres away from you when your fishing. Dispose of them as well. Gaff them and chop them up for berley.

I love Kon tiki's (5ks out and laden with sharks).