One thing which betrays genuine Russian troll-factory accounts is the language. Look for an inability to use "the" and "a" (Russian is one of the languages which doesn't have them).

"Burn in flames of a shame."

(H/t @NBCNews for their archive of confirmed troll tweets.) pic.twitter.com/Fa9wbH1Bt7

— Ben Nimmo (@benimmo) March 30, 2018