Yes.
From Wikipedia:
Most people in Continental Europe and Latin America write 7 with a line in the middle, sometimes with the top line crooked.
The line through the middle is useful to clearly differentiate the character from the number one, as these can appear similar when written in certain styles of handwriting.
This glyph is used in official handwriting rules for primary school in Russia, Ukraine, Romania, Poland and other Slavic countries, as well as in France and Germany.
So over here nobody would read this as "seven up" because there's no "line in the middle".
Oh and also they paint shrooms and stuff, and rooftops I heard, so..