It is helpful if you can keep the username list to their current names rather than initial names.
Unfortunately, there's no way to know which usernames changed without scraping all of them.
The annoying thing is: this breaks my
Trust list viewer updates. I have no way of finding a userID with a changed username. Last week, killyou72's username was changed to
FFrankie, and it wasn't in my files so I had to manually search for it. This delays my update by a few hours.
Sometimes, users ask admins or global moderators to change their usernames for personal issues (privacy, or security, for example). They changed usernames not because of fun. In such cases, in my opinion it is better and a kind of respect if we don't show the relation between initial and current usernames. If they already got accepted to do it (from admins/ global moderators) I think we should respect them (I could be wrong.)
You're wrong

The original username can't be hidden. Try this: click MY MESSAGES > New Message > Find Members > Enter "Mr. Big" > click Search > Click "Mr. Big". It shows your PM is going to "rickbig41".
I noticed some usernames are missing:
goatpig for example. Many accounts have been removed in the past, so I'm now checking 16066 profiles for missing usernames.
I'll post the results when it's done.
Only 33 usernames were missing, this is the full list:
5624.
saltwater fishing7811.
goatpig8701.
yogeshahuja9923.
TurboHz11907.
franz58313272.
49er177627.
xiaohailuo246300.
Bitcoinsalez351127.
Zuzuru381785.
omgimpro0476360.
WolfgaSNPW584147.
MrFudged6_6929584148.
MrFudged3_7000584149.
bee444827442.
Kinkingsssx874436.
Bortnikov231188625.
Robot031532520.
kakgiso1570390.
kangtesbere1570391.
AHMADYTRADE1570392.
micahalcorn1992444.
fcunha1992448.
emc3502015385.
conluqua4342033129.
ZEN1772115193.
GINSASUKE2130219.
WasiqSiddiqui32137755.
Nhap0022243672.
tojapiotrek2252792.
tiplols2486063.
up53tNovelia2537255.
the_maxwell2668635.
OlinkaThey'll be added in the next update, which is
currently running finished.
You'll need to download the full version for this, not just the daily changes.TriviaThere are 13937 usernames that start with "MrFudged"!