What do you think of people altering artwork, giving credit to the artist, but not saying they have altered it?

ri

I don’t really know how to word this but I’ll explain two situations to give you an idea of what I’m talking about.

First situation:

I am doing some artwork for people for a little extra money. My friends cousin wanted a portrait. We agreed on the price and all that. I finished it and gave it to her. I made sure it was what she wanted and she liked it. She said she loved it and she seemed really happy with it. She only wanted it in black and white. No colors. I follow her on Instagram and she posted a photo and tagged my art account in it which would be fine normally, but she added a bunch of shitty paint to it. It looks awful. The paint seriously looks so terrible and she said I did the portrait and tagged me and all that so it looks like I did the ugly paint. I don’t want that associated with my name because it doesn’t look good at all.

Second situation: today I saw on reddit something that reminded me of this situation. A photographer did a shoot for someone and the person in the photos then went on to photoshop them to try and make themselves look “better” and did a very terrible job. They tagged the photographer in the photos but made no mention of them altering the photographer’s work.

So, what do you think of these situations? Do you think people should put a disclaimer that they altered the artwork they’re saying someone else did? Do you think attempting to take legal action to remove the photos (if the people refuse to) is too far?