Based on
https://www.techrepublic.com.com/5208-6230-0.html?forumID=102&threadID=227125&start=0
it appears he’s dylan623. He’s going through all his previous posts and changing the comments to a series of ‘a’. Maybe he put in for a new job and is hoping nobody finds his comments here. It’s really clustering up the Topics list.
EDITED: I guess I should have taken a screen shot, but it’s too late now. The above link originally showed several posts titled ‘a’, attributed to dylan623, with content of ‘a’. I guess I saw this one before the system finished changing his handle in this particular discussion.
Also, he missed changing some of his posts in this discussion:
https://www.techrepublic.com.com/5208-6230-0.html?forumID=8&threadID=200099&start=0
At least, he had as of the time I posted this 🙂