A) Do you feel confused seeing more than one person with similar names? (e.g. Squall, Squall82, SquallFFVIII, Squall4ever; Zell, Zell 007, Zell's Fists of Fury, Zell69)

Sometimes, but not usually.

B) How would you feel if someone registered with a similar name as your own? (e.g. as of now Agent Proto is the only known Proto, but someone registers as Proto Man and likes to be called by Proto)

I'd feel annoyed that they stole my name. There is only one Rusty and that is me. I'd probably harass them to change there name