It's pretty much forum etiquette that it's considered bad taste to bump a very old thread with certain exceptions.
For example, this thread from 4 years ago just got bumped recently and remarked that, to paraphrase, "they should have read the sticky. :/"
Is there a protocol against necro-bumping? I know that some websites outright ban users for that. TvTropes somewhat suspend users for serial necro-bumping except for the page for trope proposals called TLP.
Updated by user 272767