A short confirming "yes, I play 1e", understanding what they are doing.
I am going to highlight some of the things people1 coming to your questions are seeing.
A relatively low rep user (don't worry about it, we've all been that at some point)
Asking fairly short to one-liner questions about concepts that aren't specially tied to one system
Tagged with adnd
The problem? People, especially new users, tag things incorrectly all the time. No system tags, just the dungeons-and-dragons tag, so we need to take it with a pinch of salt and if it looks like it could be a mis-tag, we ask for clarification/confirmation.
The adnd tag in particular adds to this, because there are several editions which could all be referred to as AD&D and so tagged such by someone who doesn't know. The fact that you know and use them correctly is great, but it doesn't change how it looks to others.
So, when someone asks, answer them understanding that they are trying to help you get the answers you want and not answers for a different system. Remember to be polite and clear so something like "Yes, I play and ask about 1e".
Now, I'm guessing the reason you've put up the discussion here is that it keeps happening. The first few times it was fine, you're taking part in a niche part of the hobby (I'm basing this on the frequency of questions coming in, which apart from you isn't a whole lot for 1e) so it's fine, but it wears thin and tiring quickly. So, what can you do?
The broadest tip: give people confirmation inherent to the question. Show your research (" I looked through whatever applicable source book, but couldn't find anything", etc.), show your context ("I know it works like this in X system, but"), or tie questions to system mechanics (This probably isn't applicable to all your questions, but it might be worth keeping in mind).
Now this might not work, if the commenters don't know enough about your edition to confirm based on this, but asking a higher quality question (research effort etc.) might make people more inclined to think you know how to use the tags. But, if you want to make sure: "cheat", include the system in the question, such "How does X work in 1e?". You've done this for this question, but that solution feels... inelegant, maybe?
1: These people (also we/commenters/etc.) ended up coming up a lot; it intends to refer to those users who look through questions for this that need/should/could be corrected/improved. If you've been active enough, you might recognize some usernames that recur in comments and edits.