He has unfriended local businessman, activist and talkradio host Frank Sheftel on LaBonge's Facebook page.
LaBonge, who is known for starting off introductions asking individuals "What high school did you you go to?" has been at odds with Sheftel in the past over various issues in the District but, according to Sheftel, they have had an amicable working relationship over the years.
What may have been the tipping point was Sheftel's recent expression of support for LaBonge's primary opponent, Stephenm Box.
"Unfriending me was so high schoolish," Sheftel told us about LaBonge, a graduate of John Marshall High School.
The most recent Facebook dust-up involving another candidate on the ropes was when Councilman Jose Huizar unfriended challenger Rudy Martinez.