This may be a callous statement from someone who as of today has not yet installed a Linux distro on my computer, but I think for the purposes of getting Linux gaming ahead, it would be fair for developers to only explicitly provide support for certain combinations of distros and install methods. If Linux users, a 0.1% of the base, are generating over 20% of the bug tickets during a game's lifetime, that's not sustainable for developers to try to respond to.
On the other hand I'm really disappointed in F-secure for having no Linux support even on their industry side.