The problem I have is that much of the time with inline spinners, when you cut two of the hooks off, you end up with a single that is much too small to reliable hook and keep a fish on. A single-hook version - with a larger hook - is a pain in the neck but it does a better job than a tiny single. As to minnow lures, you're still limited to one single hook, so cutting the trebles down when it has two or three sets still doesn't make it legal.
