Obviously this idea would need to be tweaked, however the basis would remain the same: If a clan were to be inactive for 100 days it would automatically be disbanded; this allows oothers to use that name for a clan, also prevents a whole lot of inactive clans existing. Thank you, please show your support.
And if there's a inactive clan with the clan name you want the devs will do it for you. Disband or rename.
Why does it matter to you if a inactive clan exist? Do you have a specific reason this bothers you sir?
SUPPORT! LIKE FULL FULL FULL SUPPORT Back in my days, me and some friends attempted to make clans which names were already taken although they were all inactive.