Is It Legal to Shake Someone's Hand in Chess?

Silvio Sijas: Dan Eilof blocked me on Twitter and I was very critical of him running for the ECU, the presidency. But he would greet Henrik Karsten and then shake my hands because it seems strange not to. So there is some... But with Henrik, it's probably a hack and kisses on the cheeks. Like, Silvio, what do you do now? "I'm not going to comment on that one"