Most controversial songs in ESC (and National Finals)

By "controversial" I don't just mean songs that make people argue about music quality (like joke entries or songs with atrocious vocals), but also the lyrics, themes, music videos, and artists attached to the performance.

This year (for now) it's clearly Tommy Cash. There were at least 5 posts on this subreddit alone with hundreds of comments arguing about his entry. The previous one I can think of is Let 3 (in 2023). I've seen people assuming they endorse the dictators they're dressed as for the performance, people who thought that the entire lyrics are pure nonsense, and people who very confidently claimed that the whole entry will be disqualified on the spot.

Are there any examples of that, you can think of? (In ESC or NFs.)

You can count all the songs that seemed too political, too vulgar or offensive, too weird, too out-there etc. for EBU to even accept them for the show. And - if so - did the public change their mind over time (like they did with Let 3, for the most part).