"If you're a Baptist, you don't want the government giving special treatment just to Catholics," Fish explained. "If you're Atheist, you don't want the government giving special treatment to any particular religion."
"It's a very, very, very fine line that government officials have to comply with," said Cleveland attorney James Logan.
He said cases like this one can be difficult to prove because laws involving social media are constantly developing.
"This case is going to be very fact-specific," he said. "The question of whether or not folk were really mistreated by a government official in the first instance."
The suit asks a judge to order the Sheriff to stop the activity and pay out monetary damages and attorney's fees.
"I think (the plaintiffs) have the burden of proof of showing that they've been harmed in some fashion," Logan said.
Watson said in a statement on Monday morning that he had not been officially notified of a lawsuit. His office will be ready to respond after he is officially served.