[Alberta's Child]

If an (866) number is a toll-free number, just ask four of your friends to call it ten times every day for a week. Then have them each ask four more friends, etc.

[TomGuy]

Caution: Some of those 8XX numbers are foreign and end up charging your phone a significant fee. Not all 8xx numbers are toll free.

[Dosa26]

If an (866) number is a toll-free number, just ask four of your friends to call it ten times every day for a week. Then have them each ask four more friends, etc.

Heck, if you want to commit harrassment plug the # into the dialer on a modem and let it call it non-stop till you are satisfied they have been sufficiently irritated.