That's what I do in general with articles. Russia Today has a pretty consistent and documented history of being a propaganda outlet for the Russian government: https://en.wikipedia.org/wiki/RT_(TV_network)#Propaganda_cla...
Just curious do you bring that up in every time someone quotes them as well?
TBH though, RT has a bunch of Russian-angle propaganda in some of its shows. Those are mostly the shows hosted by actual Russians, or with Russian/living-in-Russia panelists; and their newscasts. Other shows, particularly those by non-Russian journalists/creators, aren't like that. Of course, it is a Russian state entity which selects which people and shows get to be on the network. It seems to me like the main influence on the non-Russian shows is that they refrain from covering or referring to internal Russian affairs and politics.