I have no problem with bags being opened, but I do think TSA could take more care resealing bags. I have one of those hard shell ski carriers. It's a pretty simple mechanism, just a hole that has to be lined up on the two halves of the shell and a simple hook put in. On two trips in the last year the bag was not closed correctly. I never have lost any skis or poles, but the bag has come in almost open in one case.

What they could possibly think was in there after an x-ray is beyond me, but that's a different question.