Showing support for Ukraine is good, but blocking Russian visitors can only help Putin make ordinary Russians - which jad no say in his war policies - feel under siege, which is exactly what Putin wants.
dozens?maybe hundreds?
Putin will fall at some point, just like everyone before him, he's not a god, it's not a matter of if it's a matter of when.
Putin and buddies to have to calculate that risk. It may cause a cease fire.