Please make an option in the next version of KM to make tabs ignore double clicks.
Or, in other words, you just mean there are too LITTLE options for double-click
One could argue about which default settings are best, but I agree that a "do nothing" option is missing. Because I use that myself since a bad mouse was "tattering" by itself, and it was also asked a few times in this forum already. So far one has to know or guess the trick: open about:config and find the pref "kmeleon.tabs.OnDoubleClick", then set it to some useless number (like 99).