In American English sometimes people pronounce a word a certain way or use a particularly grammatical construction to assert their social status, even though technically the pronunciation or construction is incorrect. Two examples come immediately to mind: pronouncing the ‘t’ in ‘often’ and saying things like “just between you and I” instead of “just between you and me.”
Are there any similar things in Russian? That is, pronunciations or grammatical constructions that are not technically correct, but people say them anyway in an attempt to prove they are educated?