Switzerland is preparing a new law against ownership of dangerous lasers. Sale and reckless use are already prohibited, but clearly that's not enough. Outlawing ownership (without a permit, for legitimate uses) would give customs and police a possibility to prevent dangerous situations, instead of waiting until something goes terribly wrong. The problem isn't limited to aircraft. Swiss railways says dangerous situations occur every week, and cars, trucks, even football players are deliberately targeted. Some police forces are looking into (no pun intended) protective goggles.
I just researched protective measures - I was thinking, in theory there are relatively cheap dyes/coatings, why not just apply them to windscreens. The problem with current technology seems to be that protection against multiple wavelenghts significantly reduces all light transmission, which defeats the purpose of a windscreen.
