[korethr]

Though a fictitious example, in the book Cryptonomicon, the protagonist did a similar trick to try to counter the emissions from his computer being read. I don't know how practical that would be IRL, however. I use Gentoo on my daily driver, and even I am not compiling all the time. And a compile job small enough to run in an infinite loop without impacting your ability to get other work done might not make enough making noise, or might have enough of a pattern to it that it could be filtered out.