This month's annoyance: people non-consensually assigning me tickets in their organisation's ticket tracker.
As #PuTTY maintainer, I'm often asked to fill in annoying government paperwork, usually from someone else's country. "All the software our organisation uses must comply with the National Foo Directive, so please fill in this huge questionnaire to confirm that you do."
Often without bothering to even mention which nation's National Foo Directive it is. Often without noticing that a lot of the questions are obviously meaningless (e.g. assuming the product is hardware, or a cloud service, or something). And _always_ without thinking through the difference between a commercial software vendor (who has a financial incentive to do this kind of paperwork, and can employ staff to do it out of the revenue stream from selling the software itself) and an unpaid free software maintainer (LOL no).
In the past, this has generally involved an email from some actual employee tasked with going through the Big Spreadsheet of all the software that (they know) they're using. So you can reply to the person and explain their misunderstanding. (Generally I wait until the followup email before bothering, in case they manage to engage their own brain before then, which sometimes they do.)
But a new and unwelcome development is that they're starting to do it by automated ticketing systems, so I get an email saying "[employee] has assigned you a task" and I have no doubt it's going to carry on automatically pestering without any way of making it listen to reason. Probably I have no choice but to start blocking these ticketing systems' email addresses.