I opt out of them all. Partly I object to being tallied up as a profit source for lawyers I've never met and who certainly are not working for me. But mostly, it entertains me to write them letters with, perhaps, less sincerity than they're used to receiving.

If I'm supposed to waste my time over their collusion with the supposed offender in order to legitimize their payday, they can waste theirs entertaining me so I actually get something out of it.