Last year it was no lasers, this year it's also no soldering. This is how hacker cons die. #34c3pic.twitter.com/n8Ep3BQ6Px
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If HonkHase says it's a problem, it's probably a problem. The guys it usually pretty chill and only takes out the ban-hammer if it could really create some trouble (which includes legal). But: You don't mess with HonkHase.
It wasn't a problem every year prior, then suddenly all lasers disappeared on day 1 of 33c3. Whatever the problem was, it had nothing to do with individual lasers and everything to do with some kind of general decision, legal or otherwise.
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