"GunsSaveLives"-- this was my handle for LPNM / cable-access TV usage on Zianet and Comcast -- I had this one from mid-2003 til December 2007.
"mikeblessing2003" -- I had this handle for a while on Yahoo!, then one day I tried to log in and found that the account had disappeared for noreason that I could determine.
"69LickEmAll" -- My handle on Adultfriendfinder and Friendfinder.com before "mikewb1971." The handle has since been taken by someone else.
"mikewb_tsg" on Yahoo! -- Before
KCUF Media, there was
The Sedition Group -- "TSG" for short. Then Homestead started charging for the same level of service that they had been providing at no charge (like meetup.com did back in 2004) -- that was around 2000.
"Starship Trooper" -- my handle on a few message boards -- the Mars Society's, for example.It's since been taken by others and I've been overshadowed in the Google rankings.
"rah4pres" -- "Robert A. Heinlein for President" -- this was my first handle when I signed up on Flashnet back in July, 1998.
73044.2603 -- My user ID on CompuServe, from 1990 to 1996.
I make no claims to the accuracy of the time frames I've presented above, or the order of the handles I've listed -- the above was done strictly from what I could remember off-hand.