Player head collections were something fun on the old server, though at present there is no way to obtain player heads besides those that made it over from the old server. Perhaps add a donation 4all that gives everyone online the player head of the donor. Alternatively, find some commonly used player heads used in decorating, and add their heads to the decohead plugin shop.
would definitely be abused to harass certain players. would rather heads just drop in pvp as they previously did.