I don't think it is necessary for them to be integrated into the forum. Everyone can install them, if needed.
hatshepsut93 made two userscripts for forum users. They are all great, but there are not too many users have technical skills to use userscripts, they are not coders.
It takes roughly 1 minute (15 seconds if you have greasemonkey installed already) to activate such a script.
1. Download greasemonkey
2. Copy the script
3. Click on the greasemonkey button -> new user script
4. Paste the script
5. Profit
You don't need to be a coder or techsavy at all to install these scripts.