My two DC are also autistic and we've not had any other children in the house for years, so I understand that point.
However, I would say that with autistic DC it's even MORE important to model appropriate social behaviour which generally wouldn't include chucking the F-bomb around in polite company.
I'm an autistic woman too, so I appreciate straight-talking and "not holding back". I can also swear like an absolute trooper - as my previous posts on MN would show! However, there's a very big difference in bragging about "not holding back" and understanding that there may be situations where swearing isn't appropriate. I think it would be really inappropriate to be having a professional person visit your home - teacher, social worker, doctor, nurse - and be surrounded by sweary prints. I think I'd die a bit inside.
Do you remember those car stickers that everyone had in the 80s? They were quite the thing for a while. Often the ruder, the better. Really cringeworthy. These are the wall frame versions of those.
Dogs dressed up in military clothing, Victorian prints that have been bastardised - none of those are remotely "unique" or "eccentric". Look at Etsy and you'll find hundreds of the bloody things. They've been around in the crafting world for donkey's years and now are available as mass prints in shops.
I think your decor style is more mainstream than you realise, albeit a bit stuck in the past.
I'm sorry you haven't had many people agree with you and I'm sure it's hard to read. But you did say that you "don't hold back" so I imagine you appreciate honest and frank feedback.
All of that said, if you like the frames, put them up. It sounds like my household where very few outsiders visit so it's up to you. Make your home the environment that you enjoy, and that you think is appropriate for your DC. That's your choice, reagrdless of what other people might think.