Not everyone cares about, or looks at notifications, and not everyone who subscribes to a thread is actually interested in partaking (could be a mistap on one of those pesky phone screens for all that we know). I'd perceive people (even if they're only thread-starters) seeing what you're subscribed to more as a source of awkwardness...

	And I'm still opposed to arbitrary limitations on posting. I'd rather take my chances with the blue pool/tennis field captchas on registration that I get wrong five times in a row. 10/15 minutes is a [i]long[/i] time if you're a busy person. Getting "you must wait 15 minutes to post another message" during your bi-hourly ten-minute break a happy user does not make. Especially if it means you will have to postpone replying in one of your threads for hours for solely that reason.