Characters that never talk to villagers are able to whack them with nets or toy hammers, and they won't get upset because they've never met you, and can't complain.
this is kinda sad
they just take the abuse and can't speak out about it
Bulletin board? I think you mean a furniture item that you customize right? In that case the design will change if you overwrite it in your inventory. I was only told that designs placed as the townflag or on signs outside (PWPs) will stay if you delete them.
Also you don't really need to risk your flag. Why don't you save it with Mabel and then try it out? ^^
I just found out that you can fish from the cliff if it's overlooking the sea. I never thought to do that until I saw a guide on catching the king salmon.