Is it technically possible to have threads ignored, so that the title doesn't appear on the main forum page at all?

I really have two separate ideas:

1. Have an option to ignore any off-topic thread (one whose title starts with OT: or WOT:.) This was my original idea. Mods could alter an off-topic thread title to contain OT: at the front if necessary, as an intermediate option between leaving it there (and bothering people who hate all OT threads), and either moving it, locking it, deleting it (and bothering people who thought that particular OT thread belonged in the forum.)

2. There might be threads (a sticky, a long-running gag, a flame war) that I don't want to see all the time and would prefer the screen real estate for other threads. Could there be an option to set the thread to "ignore".

The ignored threads could be listed in one's MyFlyerTalk should one wish to un-ignore it.