necroing a thread is allowed as long as you have a good reason for it (up to the mods to decide if it's good or not).
IMO the guy who necroed that thread you linked are just shitposting.
Agreed. That post is obviously sig spam and will be removed.
fuck off we can't look at the date on every post you fucking hypocrite go kill yourself and get cancer you Indian scum
This is both unnecesary and unhelpful, though it is fairly easy to not notice the date as I have done it myself before, but these sorts of posts and all of the following will likely be removed if the bump was deemed unnecesary or spam.