I'm considering ignoring all future on-site notifications on Facebook. Long ago I put limits on the email Facebook can send me, but half of the "notifications" that appear in the bottom right corner of the page now are ads for applications I already use. It seems quite pointless to pay them any mind. The real problem, of course, is that I am now receiving notifications that I consider to be spam from Facebook while I'm on the Facebook site.
Mokalus of Borg
PS - I guess it could be a little worse.
PPS - But not by much.