I have had a game warden duck hunting with me and never told me to turn off the led lights I have to see where I am going.
Regarding putting them on a boat above the waterline... According to the regulations in most states you can only have your navigational lights on when the boat is under power. Drifting is a different story. You see pontoons with docking lights on all the time and technically this is illegal. When the motor is going the only thing you can legally have on are the Red/Green bow light and the white stern light.
If you install LED strip lights on your dock or on your boat above the water line, you don't need waterproof lights. You can use weather resistant lights and save a few bucks. If they get a little bit of spray on them or rain big deal. They'll hold up as long as they are not completely submerged.
If you do this to your dock and/or boat, I recommend getting RGB lights. They change colors so you can see what suits you best. I've found that fishing with mine set to purple is ideal. It won't draw in bugs or bait fish but it allows me to see a following fish without spooking them. Green attracts baitfish but they also attract bugs. The RGB lights are fun to have especially when you're in the middle of a lake at night and you set them to change colors by flashing or fading. People might think there's a UFO on the water.
I had a green light that goes underwater on my dock. It attracts bait fish and panfish. It also attracts fisherman so I took it out.
As far as the Led strip lights. When I fish at night I prefer no lights. I can see with the little light of the stars and moon once you get use to it. The bugs don't bother you as much. I often fish at night with my eyes closed so that it seems to heighten my sense of feel.
It's great to have when night fishing for walleye, or jugging for catfish down south. The bugs don't seem to be as drawn to the darker colors like blue and green.