Accidental mis-click on the "No Blocks" button can have disastrous consequences on the match and it's not a mistake that is possible in real-life play.

I suggest adding an option to the settings that when enabled would show a confirmation dialog when "No blocks" was clicked and blocks were possible.

This would function similarly to the warning that shows up when targeting some spells or abilities.

This option would be disabled by default.

Alternatively include such a popup in the "Enable Gameplay Warnings" option.