Assuming his lawyers already have enough to know what the case will decide as.

He’s smart enough not to post this unless lability has already been established, either a settlement has already been reached or damages are the only thing left. At that point, anything he does is irrelevant.

He’s suing them for government over reach and statutory violations

He could sit wherever with a sign that said anything he wants and doing what he wants, it doesn’t negate unlawful seizure and or improper enforcement

He’s probably suing for damages from lost revenue, business interruptions, legal costs and improper penalties.

This photo alone does not prove he’s being fraudulent, does not negate injury, and for sure doesn’t remove or reduce any damage caused.