In a roundabout way I've come across this older suggestion and would like to re-visit the OG one.
The Gear icon on threads and the ellipses on private messages both have "Report..." options.
I believe this is at least more consistent and easier to use.
Labels and Tags did merge as of last Jan 25th. So far, I've not had the time to dig in to what extent I am going to update them to be more useful overall. Some of that work make come along with some other enhancements I'm beginning to plan for the next few months. (cough) Tags specifically for Products are not something i'm keen to enforce (anyone can add any tag they want to any post - and there is type-ahead to help reduce dupes) because Product names change pretty fast sometimes and then other times they have contextual specificity that eludes the higher-level categorization work. BUT, I am working with our internal documentation teams, who ARE working hard to improve consistency and flexibility with manuals and meta-data (e.g., tags) on those documents. I will, at least partially, ride their coat-tails on this I think. They need it, I want it - they are probably going to think more critically than I will on how to implement a good meta-data-taxonomy.
Invalid HTML issues, unfortunately, got even worse IMO. They still happen for the same reasons, perhaps less frequently, but the error handling is worse. I have an open bug with my vendor to improve error-handling - no eta yet.
whisperer - do you think all of ^that^ means I might close this suggestion? If you have further specific or direct thoughts on how to improve the Tagging feature; perhaps a new Tag-specific suggestion would fit the bill?