Yesterday I visited Matnas (a community center, where people gather to meet friends, engage in small talk over coffee, play chess etc) and was puzzled seeing an elderly man, sipping his coffee all by himself.

I assumed that the unfriendly message displayed on his T-shirt was the reason others avoided him.
Then it dawned on me that the man is not aware of the contents of his logo and probably does not know any English.

I'll leave it to you to break the substitution code which relates the warning on his shirt. Each letter of English ABC was replaced by another one.

SE BHZ GIIR MGBYDSGN EXHA AI - XIFHGVSRIX !

Well, who buys those shirts ?