meh, i dont find distinguishing those hiragana hard,

though, シ and ツ can be hard depending on the handwriting or font.

ソ and ン can look alike, but are more easily distinguished by context of other katakana in the word.

gasoline, motherfuckers. What the hell.

Gasoline?

Write gasoline in even a slightly sloppy katakana and you will not be able to read it if you're a gaijin.

(Joke from sktechbook Full Colors)