Wow.... this has become an interesting thread
Let me give you a bit of perspective as a foreigner:
I go to Dallas once a week and I haven't even noticed those billboards.
So I guess Spanish has not been "forced on me" !!
I would consider a language being "forced" on me if I was "forced" to learn it.
I grew up in South Africa during Apartheid and we (English speakers) were "forced" to learn Afrikaans.
If we didn't pass the subject then we had to repeat the grade. It made us very angry, but we had no choice. I also had to learn Zulu and French, but did not HAVE to pass it.
When I lived in Japan I learned to speak Japanese fluently. I didn't expect them to speak to me in English. I followed all their traditions with respect. I wore a kimono to tea ceremonies, I took my shoes off at the door and I ate with chopsticks.
I met some Americans who were fluent in Japanese and some who refused to learn the language even after living there for years.
My maternal grandparents were Irish, so I celebrate St Patrick's Day.
My paternal grandparents were French, so I celebrate Bastille Day.
However, I am now in America and I hang the American flag out on July 4th etc.
My children will be raised 100% American with respect for all cultures. Their paternal grandparents are German. They'll speak several languages merely for the intellectual benefits. Spanish will be one of them.
Back to the signs......
There are way too many signs everywhere. As high as they can go. As wide as they can go. As bright as they can go.
Are there no limits?
My 2 cents