Fe and Si users in real life.
EII, ILI, ESI, LII, SLE, IEI online (say, in new members on the forum)
EPs can be a bit ambiguous due to lots of public-anchoring and chameleonic tendencies.... I_Ts can look very similar to each other for the opposite reason.
Fi can sometimes appear like Ti if you don't know ppl well, especially in a formal context (say, colleagues, public institutions and events etc.).

