I don't mind the odd drift launch when I'm at a lake, done it probably 15 times without incident. I setup my lines down wind as close to the water line as I possibly can. I then do a good old fashioned emu walk to clear any sticks between the lines and the water. Then a hook into the safety and walk out in a long loop towards the front of the kite where my board is waiting for me. Grab the kite in the right and have the bar and board in my left and start walking out into the water till I get at least two line lengths away from the trees. During the walk I keep an eye on the lines to make sure it hasn't picked up any crap on the way out. Let the kite go, wait for it to spin and launch. Works a treat, every time, except.. Today.
Trying out my new Blade fat lady for the first time, so I take it somewhere I know will have f*£k all wind so I can get used to the bar and kite. This kite is a monster 17m, so finding somewhere to rig her was a challenge. Anyway couldn't lay the lines out next to the shore like I usually do so had to go bush and clear the twigs as best I could. Set her up and headed out on to the lake, looked pretty good, couldn't see any tangles etc. let the kite go and get ready for some light wind awesomeness. The kite drifts back to its tether and there right in the middle of all the lines is a freakin tiny twig that had managed to hook every single line!
Those playing at home will of course realise that when you tie your lines into a knot it's perfect positioning for a replay of the video posted in the other thread about water launching. The stick effectively killed any chance I had of safely dealing with the stick as, even if I released the safety the lines where knotted at that point so it remains powered up. In this case it was only 5-9 knots of wind and I had a lot of space downwind but far out.. Even in 5 knots the kite was pulling pretty hard, so I was looking down the barrell of jettisoning my brand new baby, as I tried a self recovery of sorts to bring the bar up to the stick to get rid of it. I was happy to be a heavy kiter today!
I ended up getting her back in and rigging the lines across the water and launching her okay. My arms felt like lead but was glad to escape unscathed from another n00b kiting tragedy

Hope this helps my fellow Noobs self drift launching around twigs.
TL/DR: Have someone with you when you drift launch to check there is no **** caught in your lines, or even better do an assisted launch.