I would presume it was for image exif data (
http://exif.regex.info/exif.cgi ) that includes it.
Historically it did not (several times I got to send PMs to people saying maybe want to sort that out). These days many of the resizes and quality drop for embedded images will.
If your phone does something non standard then no guarantees, or you have some kind of world of warcraft
https://www.pcgamer.com/world-of-wa...ur-account-name-and-server-ip-in-screenshots/ situation going on then different matter entirely. If you bundle said images in a zip file (possibly to dodge the forum resize and quality drop) and attach that then not so much.
I don't know what is stored behind the scenes in the database such that a future update (say in 10 years when bandwidth is cheap and nobody will bat an eye at a 5 meg picture) skips things, or someone can figure out original URLs.
Short version. If you are concerned then disable it, or fire it through whatever exif stripper you care to trust.