IMHO the part that is irritating is when people answer a very old post that has already been answered, or leave a comment in a zombie that really adds nothing. Also many times the post are in response to someone who has not logged on to Talkbass for several years.
The other thing that is irritating is there are some members who seem to relish waking a bunch of zombie threads at the same time.
One reason it's irritating is most people start reading threads from the beginning. You might get through a page or two before you realize it's a zombie. Then you feel you have wasted time. You might even post yourself and not realize it's a zombie till you get to the post that woke zombie without adding any substance and all of the negative responses that follow. Then you feel embarrassed, tricked,

.
I am not saying there are not good reasons to wake a zombie. I am saying you should try to avoid it unless you have a really good reason. I have woke a few zombies myself. I often add an apology and explanation.
Often it's better to make a new thread and include a comment that you have done a search and didn't find the answer. Some people may still give a somewhat chiding response, but include references where the answer can be found.
The truth of the matter is using the search function on Talkbass often takes you down a rabbit hole where the original subject is lost and people talk about off subject topics and crack jokes instead of giving a good answer.
IMHO almost every subject related to bass that can be discussed has been discussed. If you hang around long enough you are bound to see subjects come up repeatedly. It's not like new members are prone to original thought; rather they tend to wonder about the same thing all of us did when we were new members.
If you are tired of answering the same old question just ignore it instead of dropping a snark bomb. There will be somebody on Talkbass that is at the right point in their Talkbass life cycle who will be happy to engage. No need to be an ***hat and discourage the newbs from having a conversation. But I would like to discourage the newbs from thoughtlessly waking zombies. But if you have a good reason, go ahead.