From your own link: "On January 16, 2017, Project Veritas uploaded a video showing DC Antifascist Coalition members of Disrupt J20 plotting to use 'stink bombs' at the DeploraBall. After the video's release, Disrupt J20 denied the statements, saying that the members deliberately gave false information to Veritas.[107] The video led to the arrest of one man allegedly involved in the plan,[108] as well as two associates. All three individuals pleaded guilty.[109]"

[107] Bethania Palma (January 18, 2017). "Progressive Group Claims to 'Sting' Sting Video Maker James O'Keefe". Snopes. http://www.snopes.com/2017/01/18/dueling-stings

[108] Peter Hermann (January 25, 2017). "Meetings of activists planning to disrupt inauguration were infiltrated by conservative group". Washington Post. https://www.washingtonpost.com/local/public-safety/meetings-...

[109] Hermann, Peter (March 7, 2017). "Protester pleads guilty to conspiring to disrupt DeploraBall for Trump supporters". The Washington Post. https://www.washingtonpost.com/local/public-safety/protester...