I thought I might give an overview of what was done with logitech, as the list in the question doesn't do it any favours, and I hope it serves as an example of what we can do and get some feedback as to whether it was the right way to go:
The tag logitech-mouse already existed, so retagging logitechmouse questions seemed a good place to start.
Based on that, I created logitech-keyboard, and began retagging those as well.
As the topics got smaller (looking at you, touchpad and presenter) I wasn't sure whether we should create the newer tags. I did so anyway for the time being, if only to remove logitech from them.
##Final stats ###Question Count
Final stats
Question Count
- logitech-mouse x 72
- logitech-keyboard x 40
- logitech-webcam x 21
- logitech-headset x 11
- logitech-gamepad x 6
- logitech-speakers x 5
- logitech-universal-remote x 2
- logitech-touchpad x 2
- logitech-presenter x 2
Total: 161
###General Cleanup
General Cleanup
- Questions put on hold: 2
- Old, long-closed Questions flagged & removed: 5
- Tag Wikis and Excerpts Edited/Created: 1 edited, 8 created