I have also done some work on some of the people I noticed on Twitter. Their Scholia has been expanded as a result. When they collaborated on research with Prof Meixner, they may pop up in his co-author graph.
Recently I had a tshirt printed with a design from a paper. When people suggest a picture that goes with a DOI and explain why it illustrated one of his papers, I will include the text on my blog. When there are more than one, the one Twitter likes best will get a tshirt.
It is horrible only to learn about someone when he dies like this. Apparantly this is how I deal with it.