I was kind wondering if wore heavy duty suspenders along with your belt! :-)

BTW, you are in the Netherlands - laws in Canada a bit more severe. Ever since Columbine (and the copy-cat murder in Medicine Hat), most schools have a no-tolerance towards bringing any "sharps" to school. Some have even gone to the extreme and suspended students for carrying things like toe-nail clippers :-(
Most kids in schools cannot bring half of the stuff you have on your person. Even things like meds in a FAK can be misconstrued by the facilty.

I recently gave my nephew a multi-tool that I found on the road and as well, his brother gave him a small folding knife. His mom didn't want him to take them on his camping trip (he just got them and she didn't want them to lose them, not because she didn't think they were useful.)