Dyrone said:
Ummm...plenty of people would use it. First off, you could copy the name to search on other boorus. Or you could copy the name for easy tagging...one click to copy and then past it in the tag field. That is as long as the name copied to the clipboard had underscores like a tag. Right now it's annoying to have to struggle to select that tiiiiny little name, then fill in all the spaces with underscore to convert it into a tag.
If you're uploading to Danbooru and using the post/batch bookmarklets as suggested (bookmarklet page), then the artist tag automatically gets populated when you upload it.
Also, I agree with evazion that the functionality you desire isn't really something that most people would need or use. Speaking for myself, I wouldn't need it because the upload bookmarklet already provides the artist name upon upload. If I want to search for posts by that artist, well the TPT script provides a link that does that as well (the ">>>" link next to Posts).
As far as other boorus go, well TPT isn't made for them or geared to ever support them. In that regard, the script comes as is. From what I know though, most boorus have autocomplete. You literally have to type at most a few letters before the correct artist is selected in most cases. Additionally, many boorus use different tags for the same artist, so there's also that aspect as well.
Finally, copying anything to the clipboard is not a trivial task. I know as I'm a script writer and I've tried my hand at using it in the past. As I understand it though, it's made hard for a reason, as malicious sites/scripts have used that as an exploit to copy things into/from the users clipboard.
Bottom line, you're better off just using the mechanisms already provided by the script as is, and also by this site and the other boorus.