For replying to forum posts, I think a multiquote feature would be helpful.
Here’s an example from TenForums. I selected a thread with only four posts, so the “Post New Thread” button is on the first page:
To use MQ:
- Highlight a snippet.
- Press the MQ icon at the lower right of each post.
- Repeat for any other snippets.
- Finally, press the “Post New Thread” button at the foot of the first page.
The reply text box opens with all snippets inserted in sequence.