Maybe we need to talk a bit more detail about why people want such service.
Delete guideline don't cover posts against shops or companies with incorrect informations or
has negative effect to their reputation. Delete requests for such post would be dropped.
Sueing BBSPINK will make those posts more famous so that's even worse for shops.
Arashi companies work with these cases. They forcibly move thread to log warehouses by filling it up
using some auto-post programs. It's called "埋め立て/埋める(burying/to bury)".
Logs do remain, unlike deletes, on log warehouses, but they won't show up in Google or Yahoo! search results.