"Devious Idea" has to go one step deeper to be effective, not only all Sleeper's Tomb Keys, but all ST Talismans (Sont, Lend, Yeli, Zland, Kland) that make keys get deleted as well. Otherwise people just stock pile talisman's to recreate keys immediately after waking Sleeper. It would require anyone that is willing to awaken the sleeper to have to put in effort to maintain a raid force willing to compete and kill the 5 dragons for keys.
Monthly/Bi-Monthly resets would be far too often and would lose the impact of any Awakening. However, longer resets (6-12 months) allow for a small group of miscreants to come in and awake the sleeper every reset just for the sole purpose of locking people out. Once this group has their keys, they can keep it in a perpetual state of wake-lock.
Lastly, Classic
[You must be logged in to view images. Log in or Register.] I was truly impressed that EQMac's community was able to work together as civilized players to maintain Sleeper's Tomb in the pre-awakening state for so long, until certain people stormed EQMac and woke it for the sole purpose of griefing the community. That same group of people played/still play here and have stated intention of doing the same on P99.
There has also been prior discussion in the Veeshan's Peak training/rules threads, that the same policy of allowing training may be invoked in Sleeper's Tomb and Temple of Veeshan. I certainly hope that is not the policy adopted by the staff and that it gets removed for Veeshan's Peak eventually.