Ok, I understand both points of view. In the case of the user commenting, here is right in telling you not to edit old questions. This is because, when you edit them they appear in the front page. So working on tags, I would first avoid old ones and simply post them in Meta for a mod to deal with them, or the system to automatically remove the tags (old ones).
You are doing a great job helping out, but old ones are better left alone. Your best bet is to stick with newer ones.
If you are looking into deleting tags (cleaning the whole tag system), you could create a meta post about, suggesting which tags need cleaning and why.
Any additional help from the mods you would need in the future you can contact us directly with the @ symbol followed by our names. Reason why I simplified mine to just "luis".
I'm guessing SE didn't put your email on the top of the list because it wasn't really an SE issue, it was a local site issue. Just my thoughts on why you didn't get a (reasonably) quick reply.
@Bernmeister do not worry about it, the only wrong (which is not bad, just annoying) is you retagged old questions from the 1800s. In that case I recommend meta so you can ask for clarification and any ideas to help you with any updates you want to do to the site. As mentioned by our Psycho Mod (aka: Seth the killer), the comments were rather rude.
Thanks kindly. When I first read his comments and his question what had I actually done to help, I wanted to direct him to my PPA and show him the software which I've written for Ubuntu and it's users!
@Bernmeister So, the issue is, editing old questions just to remove one tag floods the front page with stuff no one really needs to see right now, and takes reviewer time.