I would suggest that Radiant!'s: 
 *unfounded accusation of canvassing; combined with 
 *a very tardy warning on very thin grounds; and 
 *a statement that they were going to ban me (they don't appear to have as yet) simply for offering a defence here against the accusation of violating WP:NPA and leaving a relatively mild comment on the talkpage of a third party (who had themselves accused Radiant! of misbehaviour against me)... 
 ...is bordering on harassment (WP:HARRASS).