|XP is just a number
I think it's a little worse than that. There are a couple of warnings in Perl5 that frequently get triggered without any real problem in the code. I'm thinking most especially of the one when you interpolate a value that might or might not be defined, and it happens not to be. I have never yet once seen a situation where that warning was useful, but many, many times I have found myself introducing excessive verbosity and needless complexity to the code in order to suppress it.
I've also occasionally been annoyed by other warnings when I knew very well about the thing they were warning about but for one reason or another did not consider it a problem, and I wished I could just make the warning shut up.
I heard a rumor that Perl6 is going to give us the ability to shut off individual warnings, without losing the ability to see other warnings. I look forward to that.
Nevertheless, the clown described in the original post is making future trouble for himself and/or someone else.