Way back in 2009 I started a thread regarding RSS feeds, (viewtopic.php?f=2&t=7958&p=37097#p37097) in which I lamented the fact that if you delete read articles they appear again when the feeds are updated. Despite a very good discussion that ensued it still appears that feeds do not stay deleted but are reloaded when then feed is updated, so my question remains, are there any plans to incorporate this feature into DTP?
This might be revised/enhanced in a future version but right now there are no such plans for the upcoming (maintenance) releases.
Just had an idea and it might be part of version 2.1.2 
This is great news, glad I asked now! 
Version 2.1.2 will definitely improve this, it’s already working fine over here.
Working great now in 2.2.
Thanks for incorporating this it makes DTP for me the best RSS reader, I shall now move all my feeds over from Google. Cheers.