EDIT: @[email protected] shared something that might help to circumvent this shit:
Contained in these parentheses is a zero-width joiner: (โ)
Basically, add those to whatever you feel that might be filtered out, then remove the parentheses. The content inside the parentheses is invisible, but it screws with regex rules.
I'd be surprised if it bans comments for images with Lemmy.
I think the bigger problem is how to post without appearing like spam to the human community.