Presumably spammers have got in again, and no-one is taking action to stop them

The forum moderators are acting to clear what they can, they are also trying to get the forum software vendor to fix the problem.

They’ve been trying to get the forum software vendor to fix the problem for many, many years.  It’s a hopeless cause. 

Sad too, as there are so many great forum software packages out there. Many with features that would really enhance the Sonos Forum experience and lower maintenance/admin expenses.

It is truly the worst.  It’s like they took all the great features of other forum software and said “Nah, we aren’t doing that.”