I've never gotten where this attitude came from that bumping an old thread is equivalent to someone crapping on your doorstep. I've long since lost count of the number of times the following scenario popped up:
*someone googles trying to get some info, ends up on Board X as the only relevant-looking option*
*either the search engine or in-site search reveals one particular thread related to the matter*
*the specific thing being asked isn't really answered or is hidden behind the ever-helpful "i PM you fix lol" answer*

At this point our hapless knowledge-seeker makes an account and either:
A) Asks in the thread, and then gets banned when the admins and five remaining members of the board come REEEEEEEEEEEEing out of the woodwork at the necro.

or

B) They make a new thread to ask, are met with wailing and gnashing of teeth for having not "googled it", topic is locked, person banned.

Seriously, if being asked a question is such a colossal hardship, save yourself a few of those seconds you're considering wasted and just ignore it.