If anything, I'd prefer to see people cross post from small communities to bigger ones, since they will give exposure to the smaller communities. But the meme and news comms are already pretty big, so cross posting from one big group to another just feels like cluttering up people's feeds with duplicates.

Nahhh. It's a compliment! If people repost what you made it's because you fuckin cooked.

I don't ask for permission because it's almost always yes, but I will delete it if the person asks.

I like to leave a comment because it helps people discover the smaller communities

i don't post for recognition, i post to entertain. if someone crossposts more people get entertained :)

I usually try to mention the community in the original post and let the OP a bit time for cross posting it by themself, but ultimately I'll cross post. I don't see any problem with it.

No. It's not. As long as you use the crosspost button so there's a link chain to the original

without saying anything?

What do you mean, with this? (Serious question, if you're wondering. I don't do crosspost so I have no idea how this works ;)

Nope

I think the only time it would actually be impolite to do so without asking is if it was someone's OC. Like someone drew something and posted it to Lemmy and nowhere else.

This isn't reddit; we don't have a host of frothing-at-the-mouth pendants. You don't have to label stuff for the most part.

The only real no-no people will jump down your throat about is posting AI stuff (unintentionally or not).

A good rule of thumb is that you should always cite your sources, if possible. Even when quoting a song lyric, for example.