One security agent at Frankfurt would not allow me to take my toothpaste through Schengen security. I had many hours until my flight so I took my luggage (and toothpaste) back to the non-Schengen area and waited until that security agent took a break and then went through security. From what I could tell she told other agents about me (she talked to them each in turn and pointed at me while talking). None of them fussed over my toothpaste when I went through. I and felt like I won the FU lottery.