Mercury is toxic

From my local hometown paper - the Holland Sentinel:

He's not happy about it, but the owner of a local Lincoln Mercury dealership says he's willing to live with the fact that a local autism awareness group's billboard that reads "Mercury is toxic" wound up near his business.
The Holland chapter of Unlocking Autism, a national organization to raise awareness about autism, purchased the billboard on U.S. 31 to inform the public about what the group believes is the danger of thimerosal, a mercury-based preservative used in vaccines. Member Joan Reinardy of Zeeland said the organization never intended to be ironic or to cause the dealership any discomfort, she said.

I'll try to get a picture.